The US Air Force said in a statement on Sunday that two B-1B bombers have flown over the Korean peninsula in direct response to recent North Korean missile tests.
On Saturday, North Korea said that it conducted another successful test of an intercontinental ballistic missile (ICBM) on Friday. Reportedly, the missile proved its ability to strike America's mainland, drawing a sharp warning from US President Donald Trump.
The US statement added that the B-1B flight, conducted on Saturday, was in direct response to the missile test and the previous July 3 launch of the "Hwansong-14" rocket.
Reports said that North Korean leader Kim Jong Un personally supervised the midnight launch of the missile on Friday night and said it was a "stern warning" for the United States that it would not be safe from destruction if it tries to attack.
"The test-fire reconfirmed the reliability of the ICBM system, demonstrated the capability of making a surprise launch of the ICBM in any region and place any time, and clearly proved that the whole U.S. mainland is in the firing range of the DPRK missiles, (Kim) said with pride," the North's official KCNA news agency said.
The launch comes less than a month after the North conducted its first ICBM test in defiance of years of efforts led by the United States, South Korea and Japan to rein in Pyongyang's nuclear weapons ambitions.
The North conducted its fourth and fifth nuclear tests last year and has engaged in an unprecedented pace of missile development that experts said significantly advanced its ability to launch longer-range ballistic missiles.
"By threatening the world, these weapons and tests further isolate North Korea, weaken its economy, and deprive its people," Trump said in a statement. "The United States will take all necessary steps to ensure the security of the American homeland and protect our allies in the region."