Russian aircraft came close to U.S. military planes over Mediterranean -Pentagon

FILE PHOTO: A P-8A Poseidon surveillance plane conducts flyovers above the Enterprise Carrier Strike Group on February 3, 2012 in this handout photo courtesy of the U.S. Navy. Fake electronic parts are widespread in key U.S. military systems and threaten national security, with China the top source for bogus gear, a U.S. Senate investigation has concluded. The year-long probe by the Senate Armed Services Committee found counterfeit electronic parts from China in the Air Force's C-130J cargo plane, in assemblies for Special Operations helicopters and in the Navy's Poseidon surveillance plane, the panel said in its report released on May 21. REUTERS/U.S. Navy/Mass Communication Specialist 3rd Class Daniel J. Meshel/Handout FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS/File Photo

WASHINGTON (Reuters) - Russian aircraft came close to three U.S. Navy planes in the Mediterranean Sea over the weekend, the Pentagon said on Wednesday, at a time of heightened tensions between the two countries over Russia's military buildup along its border with Ukraine.

While such interactions are not rare between the United States and Russia, it comes at a particularly delicate time and amid a heightened concern about any accidents or miscalculations.