Unconfirmed reports on the ground in Syria have claimed that the Syrian Arab Army and Russian military advisers have gathered at the T4 airbase in Jabal Tyas in Eastern Homs.
The airbase is the largest in Syria and strategically located 50km west of Palmyra without any major sites in between Palmyra and T4. The Syrian Arab Army are already within a few kilometers of Palmyra.
The same source also claimed that Iraqi militias are to take part in the operation to liberate Palmyra.
It is expected this operation will begin soon.
ISIS took Palmyra from the Syrian Arab Army in May 2015 in a blitz operation. Since then, parts of the UNESCO protected ancient city have been destroyed, with the famous amphitheater being used as a stage for executions.