U.S. and Canadian aircraft intercepted and escorted two Russian jets that flew over the Beaufort Sea near the Alaska coastline, military officials said Tuesday.The Russian Tu-142 maritime reconnaissance aircraft were escorted by F-22 and CF-18 planes, the North American Aerospace Defense Command said in a release.

NORAD posted images and video of the incident on Tuesday.

NORAD F-22s, CF-18s, supported by KC-135 Stratotanker and E-3 Sentry AWACS aircraft, intercepted two Russian Tu-142 maritime reconnaissance aircraft entering the Alaskan Air Defense Identification Zone on Monday, March 9th. pic.twitter.com/39n3zqy8F8 — North American Aerospace Defense Command (@NORADCommand) March 10, 2020

pic.twitter.com/sqmtivVbv7 — North American Aerospace Defense Command (@NORADCommand) March 11, 2020

The Russian jets never left international airspace during the duration of the four-hour flight on Monday, but did come as close as 50 miles of the Alaska coast, likely closest to Utqiagvik, the northernmost community in the U.S. and formerly known as Barrow, Capt. Cameron Hillier, a NORAD spokesman at Peterson Air Force Base in Colorado Springs, Colorado, told The Associated Press.

Get Breaking News Delivered to Your Inbox

NORAD officials said in the release that the Russian aircraft did not enter U.S. or Canadian sovereign air space.

Russian jets flying near Alaska or Canada are fairly routine, with the last occurring in January. Last May, four Russian bombers and two fighter jets were intercepted near the coast of Alaska.

Hillier said such incursions happen on average between five to seven times a year since Russia restarted the practice in 2007.