PYONGYANG, May 30 -- The Democratic People's Republic of Korea (DPRK) Tuesday accused the United States of making a grave military provocation by sending a formation of the B-1B nuclear strategic bombers to the Korean peninsula on Monday for a second time in weeks.

The Korean Central News Agency 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 km 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 making a precision strike against the DPRK's major targets together with pursuit and assault planes on the nuclear aircraft carrier Carl Vinson, which is conducting a joint naval drill with the puppet navy on the East Sea of Korea," it added.

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