On 22 May 2017 , an Islamic terrorist carried out a bombing at an Ariana Grande concert in the Manchester Arena . The bomb killed 23 , including the attacker , and injured over 800 . It was the deadliest terrorist attack and the first suicide bombing in Britain since the 7 July 2005 London bombings . The attack caused worldwide condemnation and the changing of the UK 's threat level to " critical " for the first time since 2007
a bombing
Manchester Arena bombing
Manchester