Russia casts doubt on IS responsibility for attack

MOSCOW — Russia on Monday cast doubt on assertions by the United States that the Islamic State militant group was responsible for a gun attack on a concert hall outside Moscow which killed 137 people and injured 182 more.

In the deadliest attack inside Russia for two decades, four men burst into the Crocus City Hall on Friday night, spraying people with bullets just before the rock group Picnic was to perform its hit Afraid of Nothing.

Four men, at least one a Tajik, were remanded in custody for terrorism. They appeared separately, led into a cage at Moscow's Basmanny District Court by Federal Security Service officers, Reuters reported.