KYIV (Reuters) -   Russia blamed sabotage for explosions at one of its military bases in Moscow-annexed Crimea while Kyiv hinted it was responsible as Ukrainian officials said their strategy was to destroy supply lines supporting Russia's invasion. 

The blasts on Tuesday engulfed an ammunition depot at a military base in the north of the Crimean peninsula, disrupting trains and forcing the evacuation of 2,000 people from a nearby village, according to Russian officials and news agencies. 

Plumes of smoke were later seen at a second Russian military base in central Crimea, Russia's Kommersant newspaper said. The action followed explosions at a Russian military air base in western Crimea last week that destroyed eight warplanes. 

Russia's defence ministry said Tuesday's explosions at the ammunition depot were "a result of sabotage". The Crimean peninsula, which Moscow annexed in 2014, is the main supply route for Russian forces in southern Ukraine and the base for its Black Sea fleet. 

Ukraine did not confirm or deny responsibility for the explosions though its officials openly cheered Russia's setbacks there. 

Presidential adviser Mykhailo Podolyak and chief of staff Andriy Yermak both exulted on social media at "demilitarisation", an apparent mocking reference to the word Russia uses to justify its invasion.