
A pressure cooker bomb is an
improvised explosive device
An improvised explosive device (IED) is a bomb constructed and deployed in ways other than in conventional warfare, conventional military action. It may be constructed of conventional military explosives, such as an artillery shell, attached t ...
(IED) created by inserting
explosive material into a
pressure cooker
A pressure cooker is a sealed vessel for cooking food with the use of high pressure steam and water or a water-based liquid, a process called pressure cooking. The high pressure limits boiling and creates higher temperatures not possible at low ...
and attaching a
blasting cap
A detonator is a device used to make an explosive or explosive device explode. Detonators come in a variety of types, depending on how they are initiated (chemically, mechanically, or electrically) and details of their inner working, which of ...
into the cover of the cooker.
Pressure cooker bombs have been used in a number of attacks in the 21st century. Among them have been the
2006 Mumbai train bombings,
2010 Stockholm bombings (failed to explode), the
2010 Times Square car bombing attempt (failed to explode), the 2013
Boston Marathon bombing
The Boston Marathon bombing, sometimes referred to as simply the Boston bombing, was an Islamist domestic terrorist attack that took place during the 117th annual Boston Marathon on April 15, 2013. Brothers Tamerlan and Dzhokhar Tsarna ...
, the
2016 New York and New Jersey bombings and the 2017
Manchester Arena bombing
The Manchester Arena bombing, or Manchester Arena attack, was an Islamic terrorism in Europe, Islamic terrorist suicide bombing of Manchester Arena in Manchester, England, on 22 May 2017, following Dangerous Woman Tour, a concert by the Americ ...
.
Description

Pressure cooker bombs are relatively easy to construct. Most of the materials required can be easily obtained. The bomb can be triggered using a simple
electronic device
Electronics is a scientific and engineering discipline that studies and applies the principles of physics to design, create, and operate devices that manipulate electrons and other electrically charged particles. It is a subfield of physics and ...
such as a digital watch, garage door opener, cell phone, pager, kitchen timer, or alarm clock.
The power of the explosion depends on the size of the pressure cooker and the amount and type of explosives used.
[ ]
Similar to a
pipe bomb
A pipe bomb is an improvised explosive device (IED) that uses a tightly sealed section of pipe filled with an explosive material. The containment provided by the pipe means that simple low explosives can be used to produce a relatively larg ...
, the containment provided by the pressure cooker means that the energy from the explosion is confined until the pressure cooker itself explodes. This in turn creates a relatively large explosion using
low explosive
An explosive (or explosive material) is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure. An exp ...
s and generating potentially lethal
fragmentation.
History
2000–2009
French police prevented
a terrorist attack in Strasbourg, France, on New Year's Eve 2000. Ten
militants were convicted for the plot.
From 2002–04, pressure cooker bombs were widely used in terror and IED attacks in
Afghanistan
Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central Asia and South Asia. It is bordered by Pakistan to the Durand Line, east and south, Iran to the Afghanistan–Iran borde ...
,
India
India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
, and
Pakistan
Pakistan, officially the Islamic Republic of Pakistan, is a country in South Asia. It is the List of countries and dependencies by population, fifth-most populous country, with a population of over 241.5 million, having the Islam by country# ...
.
In 2003, a terrorist from
Chechnya
Chechnya, officially the Chechen Republic, is a Republics of Russia, republic of Russia. It is situated in the North Caucasus of Eastern Europe, between the Caspian Sea and Black Sea. The republic forms a part of the North Caucasian Federa ...
named Abdullah, carrying a pressure cooker bomb detonated explosives and killed six people before being arrested near
Kabul International Airport in Afghanistan.
The
Taliban
, leader1_title = Supreme Leader of Afghanistan, Supreme leaders
, leader1_name = {{indented plainlist,
* Mullah Omar{{Natural Causes{{nbsp(1994–2013)
* Akhtar Mansour{{Assassinated (2015–2016)
* Hibatullah Akhundzada (2016–present) ...
claimed responsibility.
In 2004, the
Department of Homeland Security
The United States Department of Homeland Security (DHS) is the U.S. federal executive department responsible for public security, roughly comparable to the interior, home, or public security ministries in other countries. Its missions invol ...
issued a warning to US agencies about pressure cookers being converted to IEDs.
In July 2006, in Mumbai, India, 209 people were killed and 714 injured by pressure cooker bombs in the
2006 Mumbai train bombings.
According to
Mumbai Police
The Greater Mumbai Police (Marathi language, Marathi: बृहन्मुंबई पोलीस, IAST: ''Brihanmumbaī Pulīs'', formerly ''Bombay City Police'') is the Police, police department of the city of Mumbai, Maharashtra. It is a cit ...
, the bombings were carried out by
Lashkar-e-Taiba
Lashkar-e-Taiba (LeT) is a Pakistani Islamism, Islamist militant organization driven by a Salafi jihadism, Salafi jihadist ideology. The organisation's primary stated objective is to merge the whole of Kashmir with Pakistan. It was founded in 19 ...
and
Students Islamic Movement of India (SIMI).
2010–present
Step-by-step instructions for making pressure cooker bombs were published in an article titled "Make a Bomb in the Kitchen of Your Mom" in the
Al-Qaeda
, image = Flag of Jihad.svg
, caption = Jihadist flag, Flag used by various al-Qaeda factions
, founder = Osama bin Laden{{Assassinated, Killing of Osama bin Laden
, leaders = {{Plainlist,
* Osama bin Lad ...
-linked
''Inspire'' magazine in the summer of 2010, by "The AQ chef".
The article describes the technique as a simple way to make a highly effective bomb. Analysts believe the work was the brainchild of
Anwar al-Awlaki
Anwar Nasser Abdulla al-Awlaki (; April 21 or 22, 1971September 30, 2011) was an American-Yemeni lecturer assassinated Drone strikes in Yemen, in Yemen in 2011 by a U.S. government drone strike ordered by President Barack Obama. Al-Awlaki was th ...
, and edited by him and by
Samir Khan. ''Inspires goal is to encourage "
lone wolf" Jihadis to attack what they view as the enemies of ''
Jihad
''Jihad'' (; ) is an Arabic word that means "exerting", "striving", or "struggling", particularly with a praiseworthy aim. In an Islamic context, it encompasses almost any effort to make personal and social life conform with God in Islam, God ...
'', including the United States and its allies.

Several
Islamic radical terrorist attempts in the 2010s involved pressure cooker bombs.
The unsuccessful
Times Square car bombing attempt in May 2010, in New York City, included a pressure cooker bomb which failed to detonate.
The bomb-maker,
Faisal Shahzad, was sentenced to life in prison.
In the December
2010 Stockholm bombings, Taimour Abdulwahab al-Abdaly, an Islamic extremist
suicide bomber who cited Swedish troops in Afghanistan as justification for the attack, set up a pressure cooker bomb, which failed to detonate.
Pressure cooker bombs were utilized in the
2011 Marrakesh bombing, where Adil El-Atmani, a Moroccan citizen who had pledged allegiance to
Al-Qaeda in the Islamic Maghreb, remotely detonated 2 homemade bombs, killing 17 and injuring 25.
In July 2011,
Naser Jason Abdo, a U.S. Army private at
Fort Hood, Texas
Fort Cavazos is a United States Army Military installation, post located near Killeen, Texas. The post is currently named after Gen. Richard E. Cavazos, a native Texan and the US Army’s first Hispanic four-star general. The post is located ha ...
, who took pressure cooker bomb-making tips from the Al-Qaeda magazine article, was arrested for planning to blow up a restaurant frequented by U.S. soldiers. Two pressure cookers and bomb-making materials were found in his hotel room.
He was sentenced to life in prison.
In Pakistan, in March 2010, six employees of
World Vision International
World Vision International is an interdenominational Christian humanitarian aid, development, and advocacy organization. It was founded in 1950 by Robert Pierce as a service organization to provide care for children in Korea. In 1975, emerge ...
were killed by a remotely detonated pressure cooker bomb.
In October 2012, French police found a makeshift pressure cooker with bomb-making materials near Paris as part of an investigation into an attack on a
kosher
(also or , ) is a set of dietary laws dealing with the foods that Jewish people are permitted to eat and how those foods must be prepared according to Jewish law. Food that may be consumed is deemed kosher ( in English, ), from the Ashke ...
grocery store.
Two pressure cooker bombs were used in the
Boston Marathon bombings in April 2013. The pressure cookers were filled with nails,
ball bearings
A ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the bearing races.
The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this ...
, and
black powder
Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, charcoal (which is mostly carbon), and potassium nitrate, potassium ni ...
. Initially, it was believed the devices were triggered by kitchen-type egg timers, however, subsequent evidence indicated a remote device was used to trigger the bombs. One of the bombers,
Dzhokhar Tsarnaev, told investigators that he learned the technique from an article in ''Inspire'' magazine.
On
Canada Day
Canada Day, formerly known as Dominion Day, is the national day of Canada. A Public holidays in Canada, federal statutory holiday, it celebrates the anniversary of Canadian Confederation which occurred on July 1, 1867, with the passing of the B ...
2013, pressure cooker bombs failed to explode at the
Parliament Building in
Victoria, British Columbia
Victoria is the capital city of the Provinces and territories of Canada, Canadian province of British Columbia, on the southern tip of Vancouver Island off Canada's Pacific Ocean, Pacific coast. The city has a population of 91,867, and the Gre ...
.
On May 19, 2016, passengers on a bus in
Wrocław
Wrocław is a city in southwestern Poland, and the capital of the Lower Silesian Voivodeship. It is the largest city and historical capital of the region of Silesia. It lies on the banks of the Oder River in the Silesian Lowlands of Central Eu ...
, Poland, alerted the driver to a suspicious package. The driver removed the package from the bus. Shortly later it
exploded with no fatalities but did injure one woman slightly. Authorities believed it was a three liter pressure cooker packed with nails and nitrate explosive.
On September 17, 2016, an explosion occurred in Lower Manhattan, New York, wounding 29 civilians. The origin of the explosion was found to be a pressure cooker bomb. At least one other bomb was found unexploded. A suspect for
that explosion and others in New Jersey, Ahmad Khan Rahami, was captured two days later.
Both the
2010 Stockholm bombings and the foiled
2016 Sweden terrorism plot involved pressure-cooker bombs.
On January 20, 2023, Mohammad Farooq, a student nurse, was arrested outside the maternity ward of
St James's University Hospital in
Leeds
Leeds is a city in West Yorkshire, England. It is the largest settlement in Yorkshire and the administrative centre of the City of Leeds Metropolitan Borough, which is the second most populous district in the United Kingdom. It is built aro ...
, after planning to detonate a homemade pressure cooker bomb inside the hospital. A patient at the hospital had talked Farooq down from detonating the bomb. Farooq was sentenced to 37 years.
See also
*
Car bomb
A car bomb, bus bomb, van bomb, lorry bomb, or truck bomb, also known as a vehicle-borne improvised explosive device (VBIED), is an improvised explosive device designed to be detonated in an automobile or other vehicles.
Car bombs can be roug ...
*
Nail bomb
A nail bomb is an anti-personnel explosive device containing nails to increase its effectiveness at harming victims. The nails act as shrapnel, leading almost certainly to more injury in inhabited areas than the explosives alone would. A nail ...
*
Time bomb
A time bomb (or a timebomb, time-bomb) is a bomb whose detonation is triggered by a timer. The use or attempted use of time bombs has been for various purposes including insurance fraud, terrorism, assassination, sabotage and warfare. They are a ...
*
Pipe bomb
A pipe bomb is an improvised explosive device (IED) that uses a tightly sealed section of pipe filled with an explosive material. The containment provided by the pipe means that simple low explosives can be used to produce a relatively larg ...
, another type of IED that works in a similar way to a pressure cooker bomb
References
External links
US Department of Homeland Security information leaflet on pressure cooker bombs July 1, 2010
{{DEFAULTSORT:Pressure cooker bomb
Bombs
Explosives
Explosive weapons
Improvised explosive devices
Terrorism tactics
Insurgency weapons
Cooking vessels