Multiple Air Force B-1B Lancer bombers and F-15C Eagle fighters flew a mission over international waters off the North Korean east coast, the U.S. Department of Defence (DOD) announced on Saturday.

According to the Pentagon press release, the Air Force planes departed from Okinawa, Japan – the location of an Air Force base.

“This is the farthest north of the Demilitarized Zone (DMZ) any U.S. fighter or bomber aircraft have flown off North Korea’s coast in the 21st century, underscoring the seriousness with which we take DPRK’s reckless behavior,” a statement issued by Dana W. White, Chief Pentagon Spokesperson, read.

“This mission