Russia's Federal Security Service (FSB) said on Monday that it had detained a Russian man in Crimea on suspicion of treason, accusing him of passing military secrets to Ukraine, according to a state news agency.
In a statement quoted by RIA, the FSB said that the unnamed man had "collected and transmitted information about specified sites with reference to geographic coordinates to a representative of the Ukrainian military."
Crimea, which is internationally recognized as part of Ukraine, has been under de facto Russian control since 2014.