Three Frenchmen were killed Monday and at least one other was injured when they came under fire while traveling in the Saudi Arabian desert north of Medina, a spokesman for the kingdom's Interior Ministry said. Maj. -Gen. Mansour al-Turki said the group of French travelers was resting on the side of a road when gunmen fired at their car, instantly killing two of the men. The third man died later after he was taken to a hospital, and the four Frenchman was in serious condition at an area hospital, al-Turki said. Women and children also were with the group, who were on a road 17 kilometers (10.6 miles) north of Medina, but they were uninjured. Saudi authorities were investigating the attack, al-Turki said. "Undoubtedly this is a criminal act, but it's too early to determine their motives and whether it is terrorism," he said.