Russia threatens strikes on UK military targets, 'catastrophic consequences' over Ukraine

"We have repeatedly warned that any British military installations and equipment in Ukraine and beyond its borders could be targeted in response to Ukrainian strikes on Russian territory carried out using British weapons," Zakharova said at a news briefing in Moscow.

She urged British leaders to "immediately, in the most resolute and unequivocal manner, abandon the hostile, aggressive line" to prevent the conflict from escalating to an "entirely new level."

The SCALP missile, the French version of Britain's Storm Shadow, can strike targets more than 155 miles away.

Kremlin spokesperson Dmitry Peskov said the U.K. was "participating in the war" and "pouring fuel on the fire."

A spokesperson for Britain's Ministry of Defense told Reuters London stood "shoulder to shoulder" with Ukraine and was committed to providing the equipment that Kyiv needed "to defend itself against (President Vladimir) Putin's illegal invasion."

"Russia should be in no doubt about the resolve of this government to stand against Russian aggression in Ukraine and against the U.K. and our allies," the spokesperson said.

Britain's Ministry of Defense did not confirm whether British drones had been used in the strikes.

Sergei Naryshkin, head of Russia's Foreign Intelligence Service, known as the SVR, confirmed Thursday that he met with CIA Director John Ratcliffe in Moscow earlier this week, Reuters reported.

Naryshkin characterized the meeting as routine, saying they discussed issues within the scope of their intelligence services, according to Reuters.

Trump similarly described Ratcliffe's trip as "semi-routine," according to Axios.

Fox News Digital has reached out to 10 Downing Street for comment.