"Bernard Cazeneuve, the minister of Interior has learned with infinite sadness of the death this morning in the Hautes-Pyrénées of four servicemen of the National Gendarmerie," the ministry said in a Friday press release.
The cause of the crash remains unknown.
"While participating in an exercise in the massif of Vignemale, the helicopter in which they [officers] were travelling crashed in circumstances that remain to be established," the interior ministry said.
According to local authorities, the wreckage of the helicopter has been found and a crisis unit has been activated in connection with the crash.
French President Francois Hollande has expressed condolences to the families of the victims.