US spy planes have twice tried to approach the Russian border over the Black Sea with their transponders off, the Russian Defense Ministry said, adding that SU-27 fighter jets were scrambled in response, Russia Today reports.
"On September 7, the US P-8 Poseidon surveillance airplanes tried to approach the Russian border twice… with their transponders off," Russian Defense Ministry’s spokesman, Major General Igor Konashenkov said in a statement.