FILE PHOTO: A pair of B-1B Lancer bombers soar over Wyoming in an undated file photo. Staff Sgt. Steve Thurow/U.S. Air Force/Handout via REUTERS/File photo

SEOUL (Reuters) - South Korea said on Tuesday it had conducted a joint drill with a U.S. supersonic B-1B Lancer bomber after North Korea’s state media earlier accused the United States of staging a drill to practise dropping nuclear bombs on the Korean peninsula.

Moon Sang-gyun, a spokesman for the South Korean defence ministry, said the exercise took place on Monday but declined to give further details.

Earlier on Tuesday, North Korea’s state media said the B-1B bomber flew over South Korea to stage “a nuclear bomb dropping drill”.