The Manchester suicide bomber who killed 22 people at a concert venue packed with children was part of a network, the city's chief of police said on Wednesday as troops deployed across Britain to help prevent further attacks, Reuters reported.
Police made four new arrests and searched an address in central Manchester. A source said investigators were hunting for accomplices who may have helped build the suicide bomb and who could be ready to kill again.
"I think it's very clear that this is a network that we are investigating," police chief Ian Hopkins said outside Manchester police headquarters. "And as I've said, it continues at a pace. There's extensive investigations going on and activity taking place across Greater Manchester as we speak."
