Gunmen opened fire on a tourist convoy in eastern Yemen on Friday, killing two Belgian women and their Yemeni driver as well as wounding four other tourists, a security official said, according to AP. The two slain women were traveling in a tourist convoy of at least five vehicles through a desert valley called Wadi Daw'an in the eastern Hadramut region when the gunmen attacked, security official said, speaking on condition of anonymity because he was not authorized to release the information, according to the AP. The official pointed out that authorities «have launched a wide campaign searching for the attackers,» pointing out that helicopters were used to track down suspects after sealing off areas believed to be hideouts for militants. The official said the tourists' convoy was attacked as it was leaving the ancient town of Hajreen and heading to another nearby historical site in the valley, about 450 kilometers (270 miles) east of the capital, San'a.