SANAA (AFP) - Four suspected Al-Qaeda militants were killed in an air raid that targeted their vehicle on Monday, Yemen's defence ministry announced, after tribal sources earlier said strikes by US drones killed two. "Four Al-Qaeda terrorists were killed in an air raid today," said the defence ministry's news website, adding the attack took place on the road between Marib province, an Al-Qaeda stronghold, and Sanaa. Tribal sources said earlier on Monday that two US drone strikes targeting a vehicle killed two suspected Al-Qaeda militants on a road between Marib and Al-Jawf, northeast of Sanaa.