UN peacekeepers killed in Haiti
A Nepalese soldier was later killed on patrol in the central town of Hinche.
The rebels - mostly former troops - helped to oust President Jean-Bertrand Aristide from power, but have since turned against the interim government.
The former soldiers control large parts of the country and are a key cause of instability, the BBC's Claire Marshall says.
They have not been paid since the army was disbanded by Mr Aristide in 1995.
The decommissioned troops are demanding compensation from the interim government as a reward for their part in the rebellion which toppled the former president last year.
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