Baghdad, March 13, SPA -- Attackers ambushed and killed twoAmerican contractors working for Blackwater SecurityConsulting south of the Iraqi capital, the U.S. Embassy andsecurity officials said Sunday. Embassy spokesman Bob Callahan said the attack occurredSaturday on the main road to Hillah, south of Baghdad. Hedid not say exactly where. "I can confirm that two American employees of BlackwaterSecurity were killed early yesterday (Saturday) afternoonon the road to Hillah when an IED exploded next to theirvehicle," Callahan said. An IED is a military acronym for an improvised explosivedevise, or homemade bomb used frequently by insurgents toattack U.S. troops, their allies and Iraqi forces. Another American Blackwater employee "was injured and isbeing treated at the military hospital in the Green Zone.His injuries are not life threatening," Callahan said.--SPA1153 Local Time 0853 GMT www.spa.gov.sa/246181