An investigation to identify those involved in the terrorist attack on the Crocus City Hall concert venue from abroad is underway, Russian Foreign Intelligence Service Director Sergey Naryshkin has told Sputnik.
"The investigation is underway," the intelligence chief has said when asked whether those involved in organizing the attack have been identified abroad.
On March 22, several armed men broke into the Crocus City Hall concert venue near Moscow and started shooting indiscriminately at concert-goers. They also started a fire in one of the auditoriums, which was full of people ahead of a concert. The attack left 145 people dead and many more injured. The four main suspects in the case tried to flee the scene in a car but were detained and charged with terrorism.