ISIS has claimed responsibility for Saturday night's terrorist attack in London, though authorities say the claim has not been verified. The militant group's media agency Amaq announced late Sunday that a "detachment of Islamic State fighters" carried out the atrocity, in which seven people were killed and dozens more injured before police shot dead three attackers, reports Reuters. Police say they know the identities of the attackers who drove into pedestrians in London Bridge before running amok with knives, and they will release them "as soon as operationally possible," the BBC reports. At least 12 people were arrested in connection with the attack Sunday and two London addresses were searched early Monday.
Police say they are trying to establish whether the attackers, who were wearing what turned out to be fake suicide belts, were part of a wider network. In Barking, east London, neighbors of a suspected attacker tell the Guardian that he was a married father of two children who attended a local mosque. One neighbor says she took photos of him and passed them to police because she feared he was radicalizing children in a local park. "They told me to delete the photos for my own safety, which I did, but then I heard nothing," she says. "That was two years ago. No one came to me. If they did, this could have been prevented and lives could have been saved." (Londoners fought back with bottles and chairs during the attack.)