Fighting rages on, with US-backed SDF controlling about 40 percent of strategic town near ISIL's stronghold of Raqqa.
The US-backed Syrian Democratic Forces (SDF) have advanced against the Islamic State of Iraq and the Levant (ISIL, also known as ISIS) near the armed group's stronghold in Raqqa in northern Syria, according to a monitor.
The SDF, an alliance of Kurdish and Arab fighters, now controls at least 40 percent of the town of Tabqa, and more than half of its heart, the Old City, the UK-based Syrian Observatory for Human Rights (SOHR) said on Sunday.
Rami Abdel Rahman, SOHR director, said fighting was continuing in the town on Sunday morning.
The SDF entered Tabqa on Monday as part of their offensive against Raqqa, ISIL's de-facto Syrian capital.