News reports said two of the journalists are from the state-funded RT satellite TV channel and one from the state news agency Tass.
Russia on Sept. 30 began bombing operations against Islamic State militants in Syria at the request of the Syrian President Bashar Assad.
Journalists from Russian state-owned media outlets have been embedded with the Syrian government forces throughout the conflict that began in 2011 and has claimed more than 250,000 lives.
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