Moscow attack: Putin admits it was the work of Islamists, but accuses Ukraine and the West of being involved. "We consider that the act was prepared by radical Islamists and, naturally, Western secret services contributed to it," the FSB chief said.

He added that Ukrainian intelligence services had a "direct relationship" with the attack. According to the latest official data, the attack in the city of Krasnogorsk, about 20 kilometers northwest of the center of Moscow, has left at least 139 dead and 182 injured.