A carcass of a donkey lies among the carnage in Tiero village in eastern Chad in this undated handout photograph. The United Nations refugee agency UNHCR said on Tuesday that up to 400 people are estimated to have been killed in Chad during cross-border attacks by Sudanese Janjaweed militia some 10 days ago. The agency said last week that Chadian authorities had reported an initial toll of at least 65 dead in the March 31 attacks on two villages in eastern Chad, Tiero and Marena, where an estimated 8,000 people lived.