Ukraine's audacious targeting of major Russian airbases is "grounds for a nuclear attack," a prominent Kremlin propagandist and ally of Russia's President Vladimir Putin has said.

Ukraine hits Putin’s bridge to Crimea with underwater bomb attack - Kyiv has carried out extensive attacks on Russian targets hundreds of miles from the frontline as peace talks have stalled

Across the country, swarms of small explosive drones descended onto military bases and destroyed a large part of Russia's nuclear bomber fleet. The flying bombs were smuggled into Russia by Ukrainian intelligence services in a plot known as Operation Spiderweb.

Representatives from Russia and Ukraine gather for peace talks in Istanbul. The meeting comes after the two countries each launched large-scale drone attacks on one another over the weekend, including an audacious Ukrainian strike on Russia's bomber aircraft fleet.