Algeria's Defense Ministry said those killed included 247 passengers and 10 crew.
The Tindouf region is home to refugees from Western Sahara and houses the administrative offices of the Sahrawi Arab Democratic Republic declared in 1976 by the Algiers-backed Polisario Front which seeks independence for the region.
Algeria's defence ministry says 257 people have died when a military plane carrying soldiers and their families crashed soon after takeoff in a farm field in northern Algeria.
According to local media, the Iliouchine-type plane had been transporting dozens of troops and equipment when it crashed.
TRT World spoke to journalist Soleyman Boudalia.
The radio report said the cause of the crash Wednesday near an air base in Boufarik remains unclear.
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Around 100 Algerian military personnel were on board an army plane that crashed on April 11, 2018 near an airbase outside the capital, a military source told AFP. "We can't say exact how many at this point", Mohammed Achour, chief spokesman for the civil protection agency, told The Associated Press.
Footage from the scene showed smoke coming off wreckage in a field. Other images showed that much of the plane's fuselage remained intact, as rescuers moved around the tail fin which could still be seen above olive trees.
Algeria has suffered a string of military and civilian aviation disasters.
Poor weather was the most likely cause of the crash of an Air Algerie flight in the West African state of Mali that killed all 118 people on board, French officials said on Friday.