U.K. raises threat level to 'critical' following Manchester attack

The U.K. has increased its terrorist threat level to the highest possible "critical" for the first time in a decade, British Prime Minister Theresa May announced Tuesday. The designation means a terror attack is considered "imminent" and allows for military personnel to be deployed instead of police officers at public events.
The decision comes after a lone male suicide bomber detonated an explosive Monday night near the Manchester Arena in England, where the singer Ariana Grande was performing. At least 22 people were killed and 59 injured in the blast. "The work undertaken throughout the day has revealed that it is a possibility that we cannot ignore, that there is a wider group of individuals linked to this attack," May said.
Police identified 22-year-old Salman Abedi as the bomber, and the Islamic State claimed responsibility for the attack over social media. Police on Tuesday also arrested a 23-year-old man in Manchester in connection with the attack.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
-
A tall ship adventure in the Mediterranean
The Week Recommends Sailing aboard this schooner and exploring Portugal, Spain and Monaco is a 'magical' experience
-
How drone warfare works
The Explainer From Ukraine to Iran, it has become clear that unmanned aircraft are rapidly revolutionising modern warfare
-
The tourist flood in the Mediterranean: can it be stemmed?
Talking Point Finger-pointing at Airbnb or hotel owners obscures the root cause of overtourism in holiday hotspots: unmanageable demand
-
Weinstein convicted of sex crime in retrial
Speed Read The New York jury delivered a mixed and partial verdict at the disgraced Hollywood producer's retrial
-
'King of the Hill' actor shot dead outside home
speed read Jonathan Joss was fatally shot by a neighbor who was 'yelling violent homophobic slurs,' says his husband
-
DOJ, Boulder police outline attacker's confession
speed read Mohamed Sabry Soliman planned the attack for a year and 'wanted them all to die'
-
Assailant burns Jewish pedestrians in Boulder
speed read Eight people from the Jewish group were hospitalized after a man threw Molotov cocktails in a 'targeted act of violence'
-
Driver rams van into crowd at Liverpool FC parade
speed read 27 people were hospitalized following the attack
-
2 Israel Embassy staff shot dead at DC Jewish museum
speed read The suspected gunman chanted 'free, free Palestine'
-
Bombing of fertility clinic blamed on 'antinatalist'
speed read A car bombing injured four people and damaged a fertility clinic and nearby buildings in Palm Springs, California
-
Suspect charged after 11 die in Vancouver car attack
Speed Read Kai-Ji Adam Lo drove an SUV into a crowd at the Lapu Lapu Day festival