U.S. says Russian jet flew 10ft (3m) from plane over Black Sea
U.S. officials described the intercept by the SU-27 jet on Wednesday as 'dangerous and unprofessional', Unian reports.
Russia's defense ministry said the U.S. plane had been approaching Russian territory and the SU-27 pilots had adhered to international rules.
Russia is currently carrying out military exercises in the Black Sea.
Pentagon spokesman Capt. Jeff Davis said the U.S. Navy P-8A Poseidon aircraft had been conducting routine operations in international airspace when the Russian fighter made the unsafe maneuver.
'These actions have the potential to unnecessarily escalate tensions, and could result in a miscalculation or accident,' he said.
A U.S. defense official quoted by AFP news agency said the Russian plane had flown within 30ft of the P-8A before closing to just 10ft.
However, the Russian defense ministry said fighters intercepted the U.S. plane because it was heading towards Russian territory with its transponder signal - which helps others identify it - switched off.
'After the Russian fighters got close to the spy planes for visual confirmation and to determine their wing numbers, the American aircraft changed course sharply and flew away,' a statement said.
'The Russia pilots acted in strict accordance with international rules for flights.'
In that incident, Russia also said that the U.S. plane had turned off its transponder signal.
As reported earlier by 1492news.com, NATO Air Force are going to patrol airspace of Black Sea region to monitor Russia’s troops.