US Air Force B-1 bombers carried out mock missile launches off both coasts of South Korea Tuesday night in the latest show of force against North Korea, South Korean military officials said.

Two bombers operating out of Andersen Air Force Base in Guam carried out the drills, US Pacific Air Forces said in a statement. It said the US warplanes flew with fighter jets from the South Korean air force and Japan Self-Defense Force in the first nighttime B-1 bomber exercise between the three allies.