According to Syrian state news, Daesh militants have killed at least 400 people in the ancient city of Palmyra, Reuters reports.
Numerous women and children were among the dead, local witnesses told Syrian state media.
Opposition activists reported on social media that hundreds of bodies were left out in the streets.
Daesh began its offensive in Palmyra over a week ago. On May 20, the militants took nearly full control of the ancident city on May 20 after fierce clashes with Syrian regime forces.
Following the fall of Palmyra, Daesh now controls more than half of Syria.
