"Today, we will learn about the latest terrorist attacks of the Kiev regime targeting the bridge in Crimea, hundreds of kilometers from the area of hostilities, as a result of which two innocent Russians died and a 14-year-old daughter was gravely wounded," the envoy said on Monday.
"I have not heard any condemnation of this act of terrorism from any of the Western sponsors of the Kiev regime."
Western intelligence services, including that of the United Kingdom, were complicit in the terrorist attack on the Crimean bridge, Polyansky said.
"We will have get to the bottom of this," he added.
Earlier Monday, the Russian National Anti-Terrorism Committee said the Kiev regime carried out a terrorist attack on the Crimean bridge using two surface maritime drones. Two adults were killed in the attack and a child sustained serious injuries.