ISIS flag
ISIS flagReuters

The ISIS terrorist organization has retreated from its last stronghold in the war-torn state of Syria following an offensive if the Assad regime, Syrian media reported Thursday.

The Britain-based Syrian Observatory for Human Rights said that forces from the Syrian government, the western-backed anti-ISIS coalition, and Iraq had captured the town of Albu Kamal, which sits on Syria's border with Iraq, after capturing the strategic town from ISIS.

Syrian troops and allied militiamen entered the jihadist-held town on Wednesday. Pro-Assad media sources in Syria declared the town free of Islamist terrorists Thursday.

The fall of Albu Kamal follows a series of stunningly quick defeats for ISIS in the province as well as the jihadists' loss of their de facto capital Raqqa further north. With this latest defeat, ISIS has lost its last urban stronghold in Syria.

The remaining ISIS terrorists are scattered in a number of small towns along the Syria-Iraq border, as well as in the Syrian desert.