Russia says a fighter jet intercepted two U.S. military surveillance planes in the Black Sea -- the latest in a series of midair encounters between U.S., NATO, and Russian forces.

Military officials told the state TASS news agency on August 5 that the Su-27 jet met the U.S. planes in international waters in the Black Sea.

"The Russian fighter jet crew approached the aircraft at a safe distance and identified them as an RC-135 strategic reconnaissance aircraft of the U.S. Air Force and an R-8A Poseidon, the U.S. Navy's maritime patrol aircraft," the Defense Ministry said.



There was no immediate confirmation of the incident from U.S. or NATO officials, though civilian radar-tracking sites showed U.S. aircraft in the Black Sea region on August 5, not far from Ukraine's Crimean Peninsula.

Crimea was forcibly annexed by Russian in 2014, a move that few foreign countries have recognized. The peninsula is home to the Russian Black Sea Fleet and multiple military installations.

U.S. and NATO jets routinely intercept Russian surveillance and strategic bomber aircraft off NATO member countries and U.S. airspace over the Pacific and Atlantic oceans. The vast majority of incidents are routine and considered nonthreatening.

In May, a NATO official told RFE/RL that Russian military aircraft activity in the Black Sea and other parts of Europe had increased since 2014.

Last year, the official said that NATO aircraft took to the skies 290 times to escort or shadow Russian military aircraft across Europe.

This article originally appeared on Radio Free Europe/Radio Liberty. Follow @RFERL on Twitter.