The clashes took place on Wednesday in Miski, a town in the Tibesti region of northern Chad.
The mountainous desert region borders Libya to the north and Niger to the west. Since gold was discovered there in 2012 and 2013, the area has been plagued by repeated bouts of tension and violence.
Crowds have flocked there in search of gold, while the Chadian government has granted several mining sites to large mining companies and has previously deployed the military to stop other interested parties.
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