Ukraine has said its long-range drones struck two Russian Su-27 fighter jets in occupied Crimea worth $70m.

One of the planes was on the runway ready for a combat sortie when it was blown up and destroyed, Ukraine’s SBU security services said on Saturday. A second plane was damaged in the attack on the Belbek military airfield in Russian-occupied Crimea.

The strike followed a separate operation a day earlier in which the SBU said it had hit a Russian shadow fleet vessel crossing the Mediterranean sea, the first such attack in those waters since the war began.

Ukraine said the Belbek operation marked its second successful strike on the airfield in recent days.

“On Dec 18, our drones struck Russian equipment worth hundreds of millions of dollars,” the SBU wrote, citing a Pantsir-S2 air defence system, two Nebo-SVU radars and a MiG-31 aircraft, among other military objects.

The strike came as US and Russian officials geared up for fresh talks in Florida on Saturday aimed at ending Russia’s war in Ukraine.

Kirill Dmitriev, Vladimir Putin’s envoy, criticised “warmongers [who] keep working overtime to undermine the US peace plan for Ukraine”.

Mr Dmitriev, who heads Russia’s sovereign wealth fund, is due to lead the Russian delegation in meetings with Steve Witkoff, Washington’s roving envoy and a former property tycoon, and Jared Kushner, Donald Trump’s son-in-law.

Mr Witkoff and Mr Kushner met Ukraine’s delegation, led by Rustem Umerov, in Miami on Friday after earlier discussions in Berlin with Ukrainian and European officials.

Mr Umerov said after the talks that Ukraine had “agreed with our American partners on further steps and on continuing our joint work in the near future.”