The US envoy to Saudi Arabia condemned as "unacceptable" drone attacks on Saudi oil facilities on Saturday. "The US strongly condemns todays drone attacks against oil facilities in Abqaiq and Khurais," the US mission quoted Ambassador John Abizaid as saying. "These attacks against critical infrastructure endanger civilians, are unacceptable, and sooner or later will result in innocent lives being lost,” Abizaid added, Reuters reported. Drone attacks on two Saudi Aramco facilities in Abqaiq and Khurais on Saturday caused fires that the companys security team brought under control, Saudi Arabias Interior Ministry said.