
The city has been recently liberated by Syrian army of the militants.
The grave was discovered on Friday by engineers and “popular defense forces” in the Masakin al-Jahizia neighborhood of the city, which lies only 500 meters from the ancient ruins, SANA news agency reports.
Palmyra had fallen to ISIS last May. The Syrian army, backed by popular defense groups and a Russian aerial campaign, recently regained control over the city after some four weeks of fierce fighting with ISIS.
Russian and Syrian sappers are currently demining Palmyra from bombs and land mines left by IS militants in their retreat.