If confirmed, this will be the second mass grave discovered in the city.
According to observers, the dead are Syrian government troops, whom the Islamists were executed after the capture of the city in may 2015.
The burials were found near the military airport. Damascus has not officially confirmed this information.
If confirmed, this will be the second mass grave discovered in Palmyra after government troops regained control of the city.
In April, Syrian state media reported the discovery of mass graves in Palmyra 40 people, including women and children.
At the end of March 2016 Palmyra was liberated from the ISIL militants. Operation of the Syrian government forces was carried out with the support of the Russian aviation and, according to some reports, perhaps, and ground forces.
During his stay in Palmyra radical Islamists destroyed part of the historic objects.
