Monday’s attack at an Ariana Grande concert in Manchester, England, is the latest in a series of terrorist attacks and threats that have struck the United Kingdom since 2005.
Though Britain was the scene of a large number of terrorist incidents inspired by the conflict in Northern Ireland in earlier years, most of the recent attacks have been attributed to Islamic extremists.
They have resulted in multiple deaths and dozens of injuries.
On two other occasions, law enforcement officials averted what might have been a serious attack.
March 22, 2017
Westminster Bridge attack
Three people were killed and dozens injured when a car driven by 52-year-old Khalid Masood mounted the curb on Westminster Bridge near the British Parliament and plowed into pedestrians. A fourth victim, police officer Keith Palmer, was fatally stabbed by Masood just inside the gates leading to Parliament.
Masood was shot dead by police.
Oct. 20, 2016
Foiled underground bomb attack
A backpack containing a flask, powder, ball bearings, a clock timing device, a battery and an initiator was discovered on an underground train, prompting the evacuation of a subway station. Authorities carried out a controlled explosion and there were no reports of injuries. Damon Smith, a teenager who had reportedly converted to Islam, was later charged with the crime.
Dec. 5, 2015
Muhiddin Mire, 30, attacked three people with a knife at a London underground station in an incident police described as terrorism. One of the victims suffered serious knife wounds. Mire, who was born in Somalia, reportedly shouted, "This is for Syria.” He was arrested after being Tasered by police.
May 22, 2013
Solider hacked to death
Off-duty British soldier Lee Rigby was hacked to death on the street as he was walking outside his barracks in the Woolwich neighborhood of southeast London. The assailants, Michael Adebolajo and Michael Adebowale struck Rigby with a car before attacking him with knives and a cleaver. The suspects, both British citizens of Nigerian descent, were shot by police and arrested. They were later found guilty and sentenced to life in prison.
June 29, 2007
Twin car bombings thwarted
Two car bombs were discovered near the Haymarket neighborhood of London and were disabled before they could explode. In both cases, the explosive devices were planted in parked cars.
July 21, 2005
Failed transit attack
Three London underground stations and a bus were targeted with explosives, but only the detonators went off, causing no injuries. Four assailants, who were all born in East Africa, were arrested, tried and sentenced to life in prison.
July 7, 2005
Coordinated suicide bombings
Coordinated suicide bomb attacks on three underground trains and a double-decker bus in central London killed 52 people and injured more than 700. The perpetrators were four British-born Islamist extremists.