A Darfur town has been burnt to the ground since it came under the control of Sudanese troops this week, the UN said Sunday. Observers who inspected the town of Haskanita say 15,000 civilians have fled since the army moved in. The UN said Sudanese government forces took control of the area after suspected Darfur rebels attacked the nearby AU base a week ago, killing 10 peacekeepers. The destruction of the largely ethnic African town some 150 meters from the base appeared to be in retaliation for the earlier attack.