Russian Bear bombers and spy planes buzzed Alaskan airspace the past two nights in a repeat of incidents earlier this week, two U.S. officials told Fox News on Friday.
Wednesday night a pair of Russian spy planes Ilyushin IL-38s flew near the Aleutian Islands in the Bering Sea staying in the U.S. Air Defense Zone for a few hours before departing.
Thursday night, a pair of long-range nuclear-capable Tupolev Tu-95 Bear bombers flew near Alaska and Canada staying in each country's air defense zone for hours. Two U.S. Air Force F-22 fighter jets intercepted the bombers, a NORAD spokesman told Fox News without elaborating.
The Russian jets in both incidents remained in international airspace. It was not immediately clear how close they came to mainland Alaska.
Russia now has flown bombers or spy planes near Alaska on four consecutive nights this week, the first time since President Trump took office that Russia has flown this close to the United States. The U.S. Air Force scrambled fighter jets in some of these instances.
Pentagon officials said they believed the Russians were testing the U.S. Air Force's response to their bomber flights.
The Russian action comes less than a week after Secretary of State Rex Tillerson and President Trump said U.S.-Russian relations had reached a "low point."
The last time Russian bombers came this close to the U.S. was on July 4, 2015 when a pair of Russian bombers flew 40 miles off the coast of California.
The U.S. military also conducts flights near Russia, but in most cases uses its own reconnaissance aircraft like the U.S. Air Force Boeing RC-135 and not long-range bombers, according to officials.
In the past, the U.S. Navy often has performed reconnaissance below the sea near Russia using Los Angeles or Virginia-class attack submarines, but these operations are classified and not disclosed publicly.
Lucas Tomlinson is the Pentagon and State Department producer for Fox News Channel. You can follow him on Twitter: @LucasFoxNews