LONDON (Reuters) - Britain's MI5 security service missed opportunities to prevent a 2017 suicide bombing at an Ariana Grande concert in Manchester that killed 22 people, senior lawmakers said in a report on Thursday.
Britain suffered four militant attacks in 2017 that killed 36 people - the deadliest spate since the London "7/7" bombings of 2005.
UK parliament's Intelligence and Security Committee (ISC) said there had been a number of failures by those monitoring the bomber, 22-year-old Briton Salman Abedi born to Libyan parents.
Abedi had been known to MI5 since 2014 but was never referred to a counter-extremism programme; MI5 had not placed travel restrictions on his movements.
He also visited an extremist contact in prison but no follow-up action was taken by police or MI5.
"What we can say is that there were a number of failures in the handling of Salman Abedi's case," Dominic Grieve, the committee chairman, said.
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"While it is impossible to say whether these would have prevented the devastating attack on May 22, we have concluded that, as a result of the failings, potential opportunities to prevent it were missed," Grieve said.
(Reporting by Michael Holden; editing by Kate Holton/Guy Faulconbridge)
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