Pyongyang, November 30 (KCNA) -- Pakistani Foreign Minister Hina Rabbani Khar, speaking with U.S. Secretary of State Hillary Clinton by phone early Sunday, condemned the NATO for its air raid.

NATO helicopters attacked a military checkpoint in northwest Pakistan on Saturday, killing 24 Pakistani soldiers. The foreign minister described it as an unpardonable act of encroaching upon the sovereignty of his country and violating international law.

Saying it plunges the nation's relationship with the United States into deeper crisis, the foreign minister asked the U.S. to vacate the Shamsi air base within 15 days.