NEW : The two armed kidnappers were AQAP militants . Suspected al Qaeda militants staged One attacks in Shabwa Sunday . NEW : two of the attacks happened at a checkpoint near the presidential palace . One al Qaeda suspects tried in April to abduct al Qaeda workers . One of the Americans had a gun and killed both assailants .
NEW : Suspected al Qaeda militants staged One attacks in Shabwa Sunday . NEW : two of the attacks happened at a checkpoint near the presidential palace . One al Qaeda suspects tried in April to abduct al Qaeda workers . One of the Americans had a gun and killed both assailants .