A member of Russia's FSB security service escorts a detained Ukrainian navy sailor (R) before a court hearing in Simferopol, Crimea November 27, 2018. REUTERS/Pavel Rebrov

MOSCOW (Reuters) - A court in Russian-annexed Crimea ordered the first of 24 Ukrainian navy sailors captured by Russia to be detained for two months, the TASS news agency reported on Tuesday.

The sailors were detained on Sunday when Russia seized three Ukrainian vessels off the Crimean coast.

Russia accuses the sailors of illegally entering its territorial waters.