MANCHESTER, England — British Prime Minister Theresa May on Tuesday night raised the nation’s threat level and deployed the military to guard concerts, sports matches and other public events, saying another attack “may be imminent” following a bombing Monday night that left 22 people dead.

The announcement, which takes Britain’s alert level from “severe” to its highest rating, “critical,” clears the way for thousands of British troops to take to the streets and replace police officers in guarding key sites.

May announced the move after chairing an emergency meeting of her security cabinet and concluding that the attacker who carried out Monday’s bombing may have been part of a wider network that is poised to strike again. The decision, she said, was “a proportionate and sensible response to the threat that our security experts judge we face.”

The worst terrorist attack on British soil in over a decade was carried out by a 22-year-old British citizen who lived a short drive from the concert hall that he transformed from a scene of youthful merriment into a tableau of horror.

Read the whole story from The Washington Post.

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