Ukrainian forces raised their national flag on a recaptured Black Sea island on Thursday in a symbol of defiance against Moscow, but Russian forces consolidated gains in eastern Ukraine and probed the defences of potential new targets.

Moscow responded to the flag-raising ceremony fast. It said one of its warplanes had struck Snake Island shortly afterwards and destroyed part of the Ukrainian detachment there. The tiny island, located about 140 km (90 miles) south of the Ukrainian port of Odesa, is strategically important as it guards sea lanes. Russia abandoned it at the end of June in what it said was a gesture of goodwill - a victory for Ukraine that Kyiv hoped could loosen Moscow’s blockade of Ukrainian ports.