Russian authorities said they had detained 11 people in connection with a terrorist attack on a concert hall in a Moscow suburb, as the death toll from the Friday night assault rose to 115, investigators said.
Among those taken into custody were four people who prosecutors said played a direct role in the violence, in which gunmen shot audience members at close range and set off smoke bombs.
Islamic State, the Islamist militant group, claimed responsibility in a statement on Telegram. Officials from the U.S., which warned Russia of intelligence indicating an…
