Palmyra

The heavily populated town of Qaryatain lies southwest of Palmyra, which is home to towering Roman ruins, and some 85 kilometers from Homs city. Its capture allows the IS group to link up areas under its control in and around Palmyra with areas in the eastern countryside of Qalamoun in Damascus province.

An IS statement, released late Thursday, said the six busts were found when the smuggler was stopped at a checkpoint. The issue was referred to an Islamic court in the IS-held northern Syrian town of Manbij, which ordered that they be destroyed and the man be whipped.

Photographs released by the group show IS militants destroying the busts with large hammers. Another photo shows the smuggler being whipped.

Maamoun Abdulkarim, the head of the government's Antiquities and Museums Department, told The Associated Press that the extremists destroyed the grave of Mohammad Bin Ali, a descendant of Imam Ali, cousin of Islam's Prophet Muhammad and a deeply revered Shiite saint.

The grave was just north of Palmyra.

The second tomb is close to the city's famed Roman-era archaeological site and was the final resting place of a Sufi scholar, Nizar Abu Bahaa Eddine, who lived in Palmyra some 500 years ago.