Photos: Graphic Conent - Slaughter images emerge from Palmyra over-run by ISIS

Shocking images emerged today showing decapitated bodies strewn across blood-filled streets in Palmyra – victims of the Islamic State's unrelenting savagery as they stormed the ancient city. The terror group have now seized full control of the historic settlement, putting the world heritage site and its priceless 2,000-year-old artefacts at risk of destruction.

The jihadis have also captured the military air base, intelligence headquarters and its notorious prison, where hundreds of inmates have reportedly been liberated. British-based monitoring group, the Syrian Observatory for Human Rights (SOHR), said ISIS now controlled half of all territory in the war-torn country. See the image below....

Pro-government forces beat a hasty retreat late last night after 100 fighters were slaughtered in violent clashes in just a few hours. It is the first time ISIS has claimed a city directly from the Syrian army and allied forces, which have already lost ground in the northwest and south to other insurgent groups in recent weeks.

Beibares Tellawi, an activist in Homs province, said the militants had reached Tadmur prison, where thousands of Syrian dissidents have been imprisoned and tortured over the years. The fate of the prisoners was not immediately known, although pro-ISIS Twitter accounts shared a image claiming to show inmates celebrating with militants after being set free.