The Russian ambassador to the issued a warning over as he has accused Britain of playing a role in 's audacious drone attacks over the weekend. Andrei Kelin warned 's attack on warplanes deep inside Russia risk escalating the conflict to "World War Three", claiming Kyiv's actions "are bringing the conflict to a different level of escalation".

Speaking to , he said Kyiv should "not try to engulf World War Three" and appeared to partly blame the for the . The ambassador suggested Ukraine must have been assisted during the mission, codenamed Operation Spiderweb. He told the broadcaster: "[This] kind of attack involves, of course, provision of very high technology, so-called geospaced data, which only can be done by those who have it in possession. And this is London and Washington.

"I don't believe that America [is involved], that has been denied by President Trump, definitely, but it has not been denied by London.

"We perfectly know how much London is involved, how deeply British forces are involved in working together with Ukraine."

Mr Kelin described the idea of as the "very worst case scenario that we can imagine".

Russian warplanes, including strategic bombers and command-and-control aircraft, were struck by Ukrainian first person view (FPV) drones which had been smuggled into and launched remotely from wooden containers carried on trucks.

Ukrainian officials estimated the attacks caused more than £5 billion in damage, although this has been disputed by Moscow.

said the daring raid, planned over 18 months, "will undoubtedly be in history books".

US President Donald Trump said told him "very strongly" that .

The leaders shared a phone call that lasted over an hour on Wednesday as Washington continues to push for peace in .

"It was a good conversation but not a conversation that will lead to immediate peace," said.

A Downing Street spokesperson said: "We never comment on operational matters at home or abroad."