Syrian President Ahmed al-Sharaa on Sunday announced a deal with the chief of Kurdish-led forces that includes a ceasefire, after government troops advanced across Kurdish-held areas of the country's north and east.

Syrian Kurdish leader Mazloum Abdi said he agreed to the deal to avoid a broader war. He made the decision after deadly clashes in the Syrian city of Raqa on Sunday between Kurdish-led forces and local fighters loyal to Damascus, and fighting this month between the Kurds and government forces.

The agreement will also see the Kurdish administration and forces integrate into the state after months of stalled negotiations on the issue.

But it marks a blow for the minority, which has long held ambitions of preserving the de facto autonomy they had exercised over areas they held for over a decade.

Sharaa announced the agreement to reporters on Sunday. He said had had been scheduled to meet Abdi, who heads the Kurdish-led Syrian Democratic Forces (SDF), but that it had been postponed until Monday due to poor weather.

"In order to calm the situation, we decided to sign the agreement," Sharaa said.

Abdi said in a statement broadcast by Kurdish television channel Ronahi that "in order for this war not to turn into civil war... we accepted to withdraw from the Deir Ezzor and Raqa regions to Hasakeh".

He said he would explain the deal's details to Syria's Kurds after returning from Damascus.

Government forces this weekend captured the strategic city of Tabqa in the Raqa region as well as the Euphrates Dam. They also advanced into parts of Deir Ezzor province, including the Al-Omar oil field, the country's largest, having earlier made advances in Aleppo province.

Syrian state media reported celebrations in some areas after the deal's announcement, including in Raqa city where state media had earlier said SDF gunfire had killed two civilians.

Sharaa on Sunday met US envoy Tom Barrack, who called the deal with the Kurds a "pivotal inflection point".

The envoy, whose country has long supported the Kurdish forces but also backs Syria's new Islamist authorities, had met Abdi in Erbil on Saturday.

The Syrian presidency published the text of the 14-point agreement, which includes integrating the SDF and Kurdish security forces into the state and the immediate handover of Kurdish-run Deir Ezzor and Raqa provinces.

It will also see Damascus take responsibility for Islamic State group prisoners and their families held in Kurdish-run jails and camps.

Sharaa had on Friday issued a decree granting the Kurds official recognition, but the Kurds said the announcement fell short of their expectations. (AFP)