Armed police is on patrol in central Manchester. - EPA/Andy Rain
Manchester bomber a 'mule'? 3 more arrested
LONDON, May 24, 2017
British police have arrested three more men as investigation into the Manchester Arena bombing continued, with officials saying the bomber Salman Abedi may not have acted alone.
Police arrested the three in Manchester on Wednesday. Abedi's 23-year-old brother was arrested on Tuesday, said a BBC report.
Abedi killed 22 and injured 64 when he blew himself up outside an Ariana Grande concert on Monday night.
The UK terror threat level is now up to its highest level of "critical", meaning more attacks may be imminent.
It means military personnel are being deployed to protect key sites.
Home Secretary Amber Rudd said: "[Monday's attack] was more sophisticated than some of the attacks we've seen before, and it seems likely - possible - that he wasn't doing this on his own."
BBC security correspondent Frank Gardner said the bomber is thought to have been a "mule", using a device built by someone else.
Prime Minister Theresa May said soldiers would be placed in key public locations to support armed police in protecting the public. These include Buckingham Palace, Downing Street, embassies and the Palace of Westminster.
Military personnel may also be seen at other events over the coming weeks, such as concerts, May said, working under the command of police officers.
The prime minister said she did not want the public to feel "unduly alarmed" but said it was a "proportionate and sensible response".
