The ministry said it had identified the Norwegian plane as an anti-submarine P-3 Orion aircraft and said it had switched off its transponder during the flight, the agencies reported.
Earlier on Tuesday, A Russian Su-27 jet fighter intercepted a US B-52 strategic bomber on Russia's border over the Baltic Sea.
Russian MiG-31 fighters. File picture
Russia sent a MiG-31 jet fighter on Tuesday to intercept a Norwegian patrol plane flying along Russia's border over the Barents Sea, Russian news agencies quoted Russia's Defence Ministry as saying.
