The United Nations said on Thursday it was looking into a media allegation it had withdrawn a security escort for actor George Clooney, a U.N. "messenger of peace," as he visited a lawless area of Chad. U.N. spokeswoman Michele Montas cast doubt on the report, saying the U.N. mission in the West African country had no armed military police and relied on others for armed escorts. In a column published on Thursday, New York Times journalist Nicholas Kristof, who is traveling with Clooney, linked the alleged U.N. move with nervousness in the region over a possible indictment by the International Criminal Court of President Omar Hassan al-Bashir of neighboring Sudan. "We are still trying to ascertain the facts," Montas told a regular news briefing. [...] Montas said the U.N. World Food Program had flown Clooney's party to eastern Chad and enabled it to visit WFP project sites in the area, where hundreds of thousands of refugees from Sudan's violence-torn Darfur region are encamped.