MOSCOW, May 25 (Reuters) - A Russian court on Tuesday said it had fined U.S. social network Facebook 26 million roubles ($353,902) over a failure to delete content Moscow deems illegal.

Moscow's Tagansky District court earlier fined Google 6 million roubles for similar offences. ($1 = 73.4666 roubles) (Reporting by Maria Vasilyeva and Marina Bobrova Writing by Alexander Marrow and Polina Devitt Editing by David Goodman )