Russian authorities said that they have arrested 11 people, including four suspected gunmen, following the deadly attack at a concert hall near Moscow.
Officials say at least 115 people were killed.
Moscow Attack: Russia conducts 'counter-terrorism operation' in Dagestan, detains three | Oneindia
Oneindia
On Sunday, Russia carried out a "counter-terrorism operation" in the southern region of Dagestan, resulting in the detention of..
