In this undated photo released by the Syrian official news agency SANA, shows the site of the ancient city of Palmyra, Syria. |AP
This file photo released May 17, 2015, by the Syrian official news agency SANA, shows a general view of Palmyra, Syria. |AP
This undated file image released by UNESCO shows the site of the ancient city of Palmyra, Syria. |AP
In this photo released by the Syrian official news agency SANA, Syrian soldiers gather around a Syrian national flag in Palmyra, Syria. |AP
FILE - This undated file image released by UNESCO shows the site of the ancient city of Palmyra in Syria. |AP
In this photo released by the Syrian official news agency SANA, Syrian soldiers take up positions during fighting between Government forces and Islamic State group militants in Palmyra, Syria. |AP
In this photo released by the Syrian official news agency SANA, Syrian soldiers use military binoculars during fighting between Government forces and Islamic State group militants in Palmyra, Syria. |AP
In this photo released by the Syrian official news agency SANA, Syrian soldiers take up positions during fighting between Government forces and Islamic State group militants in Palmyra, Syria. |AP
In this photo released by the Syrian official news agency SANA, Syrian soldiers sit on top of a tank during fighting between Government forces and Islamic State group militants in Palmyra, Syria. |AP
In this photo released by the Syrian official news agency SANA, smoke rises from a gas station from fighting between Government forces and Islamic State group militants in Palmyra, Syria. |AP
This file photo by the Syrian official news agency SANA, shows the general view of the ancient Roman city of Palmyra, northeast of Damascus, Syria.. |AP
