The South Korean military said two U.S. supersonic bombers conducted live-fire drills on Saturday in South Korea in a show of force following North Korea's test-launch of an intercontinental ballistic missile.

The South's air force said the pair of B-1B Lancer strategic bombers flew from a U.S. base on Guam.

North Korea announced on Tuesday it successfully test-launched an ICBM, saying the missile was capable of carrying a large and heavy nuclear warhead.

Some experts believe the missile has the range to reach Alaska and Hawaii and the test signaled a significant advance in the North's declared intent to build a nuclear-tipped missile that can hit the U.S. mainland.