UK military ends week-long counter-terrorism deployment

A soldier joins armed police officers guarding Downing Street in London, Wednesday May 24, 2017. Britons will find armed troops at vital locations Wednesday after the official threat level was raised to its highest point following a suicide bombing that killed more than 20, as new details emerged about the bomber. (AP Photo/Tim Ireland)

LONDON (AP) — Britain’s Ministry of Defense has announced an end to its week-long deployment to help police cope with an increased threat of an extremist attack after the Manchester concert bombing.

Chief of the Defense Staff Stuart Peach said Thursday that roughly 1,000 military personnel had been deployed along with police as the terrorist threat was raised to “critical” after the attack that killed 22 people and injured dozens more.

The official threat level has been lowered from “critical” — the highest level, meaning an attack may be imminent — to “severe,” which means the government believes an attack is highly likely.

Peach said military personnel will “remain at readiness to deploy” if needed.

The end of the military role came after Manchester Police said they had released a man who was arrested in the concert bombing investigation without charging him. Police said the 21-year-old was set free Wednesday night. His name was not released.

Ten men are being questioned in custody about possible roles in the blast. All were arrested on suspicion of violating the Terrorism Act. They have not been identified or charged. Six people, including a woman, have been released without being charged.

Details about the investigation have not been released.

Police say the 22-year-old bomber, Salman Abedi, acted largely alone when he assembled the device used in the May 22 attack at an Ariana Grande concert.

Abedi died in the blast. He was a Manchester native whose parents had moved to England from Libya.

Grande has announced plans to return to Manchester for a benefit concert set for Sunday evening.