Russia said on Wednesday it had fired warning shots and dropped bombs in the path of a British warship to chase it out of waters Moscow claims in the Black Sea off the coast of the Crimea peninsula.

Britain rejected Russia’s account of the incident, saying it believed any shots fired were a pre-announced Russian “gunnery exercise”, and that no bombs had been dropped. But it confirmed that its destroyer, HMS Defender, had sailed through what it described as waters belonging to Ukraine.

The ship was “conducting an innocent passage through Ukrainian territorial waters in accordance with international law”, Britain’s Ministry of Defence said in a statement.