The United States threatened to reimpose sanctions on Myanmar's generals after they seized power in a coup and detained elected leader Aung San Suu Kyi, whose whereabouts remained unknown on Tuesday more than 24 hours after her arrest.<br /><br />The UN Security Council was due to meet later on Tuesday, diplomats said, amid calls for a strong global response to the military's arrest of the Noble Peace laureate and dozens of her political allies on dawn raids on Monday.<br /><br />The coup followed a landslide win for Suu Kyi's National League for Democracy (NLD) party in November elections, a result the military has refused to accept citing allegations of fraud.