Warrant Officer Gilles Sarrazin died after suffering severe injuries when a mine exploded. A Tajik man, Azam Asrorov, was wounded in the blast, the UN said.
The border with Afghanistan was heavily mined during Tajikistan's civil war between 1992 and 1997.
RFE/RL Central Asia Report
SUBSCRIBE For regular news and analysis on all five Central Asian countries by e-mail, subscribe to "RFE/RL Central Asia Report."