The United States has flown two strategic bombers in a show of force over the Korean peninsula, in a joint military exercise with South Korea.
The bombers took off from the US Pacific territory of Guam on Tuesday night, before entering South Korean airspace and conducting firing exercises.
Two B-1B combat bombers were joined by two South Korean F-15K fighter jets, and carried out air-to-ground missile drills off the east coast of South Korean, repeating the drill over waters between South Korea and China.
The US military said in a statement it conducted drills with Japanese fighters after the exercise with South Korea, making it the first time US bombers conducted training with fighters from both Japan and South Korea at night.
The exercises follow heightened tensions with North Korea over its nuclear program and was part of a programme of “extended deterrence” against North Korea.
Pyongyang conducted its sixth nuclear test and launched two missiles over Japan in recent months.
It comes as President Donald Trump met top defence officials to discuss how to respond to any threat from North Korea, or prevent Pyongyang from threatening the US and its allies with nuclear weapons, the White House said in a statement.
Mr Trump and North Korean leader Kim Jong-un exchanged heated rhetoric in recent weeks.
Mr Trump accused Mr Kim on being “on a suicide mission”, while Mr Kim responded by vowing to “tame the mentally deranged US dotard with fire.”