North Korea on Tuesday accused the US of making a grave military provocation by sending a formation of B-1B nuclear strategic bombers to the Korean Peninsula on Monday for a second time in weeks.



The Korean Central News Agency (KCNA) said that the formation flew over South Korea "once again to stage a nuclear bomb dropping drill."



"The formation of B-1B took off Guam at the dawn of the day and flew over the 80 kilometers of the east of Kangrung on the East Sea of Korea near the Military Demarcation Line," said the news agency.



"It frantically staged a joint drill for a precision strike against major North Korean targets together with pursuit and assault planes on the nuclear aircraft carrier USS Carl Vinson, which is conducting a joint naval drill with the puppet navy on the East Sea of Korea," it added.



Reuters quoted South Korea as saying on Tuesday that it had conducted a joint drill with a US supersonic B-1B Lancer bomber on Monday.



This was the second time for B-1B bombers to stage a nuclear bomb dropping drill in South Korea within several weeks, according to North Korea officials.



The US Navy said its aircraft carrier strike group, led by the USS Carl Vinson, also planned a drill with another US nuclear carrier, the USS Ronald Reagan, in waters near the Korean Peninsula, Reuters reported.



A US Navy spokesman in South Korea did not give specific timing for the planned drill.



North Korea also said on Tuesday that its test-firing of a precision-guided ballistic missile was a success, a day after the projectile landed in waters close to Japan.



According to KCNA, North Korean leader Kim Jong-un supervised the test on Monday and ordered the development of more powerful weapons in multiple phases in accordance with its timetable to defend North Korea against the US.



