Official says U.S. may mull pre-emptive Iran strike

By Adrian Croft

LONDON (Reuters) - The United States or other countries will one day be forced to consider pre-emptive action if Iran and North Korea continue to seek nuclear weapons, a senior U.S. government official said on Tuesday.

The United States and its allies have accused Iran of pursuing nuclear weapons under the guise of a civilian energy program and are pushing for United Nations' sanctions. Tehran denies the accusation.

North Korea conducted an underground test of what was believed to have been a small nuclear weapon last month.