Putin admits that the Moscow attack was the work of "radical Islamists" and insists on the connection with Ukraine. "We know who committed this atrocity against Russia and its people.

What interests us is the sponsor," he added. The Russian leader again stated that the attackers, after the attack on Friday night in which at least 137 people died, tried to flee to Ukrainian territory. "Who was waiting for them there? Those who support the Kiev regime do not want to be complicit in terror and supporters of terrorism," he said.