A deal has been reached between the Syrian government and Isis militants that could see the end of the siege of Yarmouk Palestinian refugee camp in Damascus.

The deal would allow wounded fighters belonging to armed groups to withdraw from the camp safely to their stronghold in Raqqa or other destinations.

According to UK-based monitoring group, the Syrian Observatory for Human Rights (SOHR), buses to transport the fighters from the suburb of al-Qadam have already started arriving.

SOHR said in a statement on their website: “Reliable sources reported to SOHR that a number of buses already reached al-Qadam area preparing for the operation, amid secrecy by IS (Isis) and regime forces about the agreement details.”

The UN told news network Al-Jazeera it was observing the deal but had not brokered it.

Indyplus gallery: Yarmouk refugee camp Show all 5 1 /5 Indyplus gallery: Yarmouk refugee camp Indyplus gallery: Yarmouk refugee camp pg-30-syria-reuters.jpg The camp at Yarmouk near Damascus contains 20,000 besieged Palestinians Reuters Indyplus gallery: Yarmouk refugee camp yarmouk-voices-rt.jpg Free Syrian Army fighters carry their weapons as they walk towards the frontline in the refugee camp of Yarmouk, near Damascus Ward Al-Keswani /Reuters Indyplus gallery: Yarmouk refugee camp 01-yarmouk3-ap.jpg The emaciated body of Awad al-Saidi, who, according to locals, died of hunger and sickness there (AP) AP Indyplus gallery: Yarmouk refugee camp 01-yarmouk2-ap.jpg A funeral for a resident of Yarmouk (AP) AP Indyplus gallery: Yarmouk refugee camp 02-yarmouk-ap.jpg Israa al-Masri, who died shortly after this photo was taken, was one of 18,000 Palestinians trapped and starving in the Yarmouk refugee camp in Damascus AP

The Yarmouk refugee camp was besieged by Isis and members of the al-Qaeda affiliate Jabhat al-Nusra in April, putting militants in a strategic position just five kilometres away from the Syrian President’s Presidential Palace.

Around 18,000 mostly Palestinian men, women and children were trapped under the siege. The camp was also reportedly being shelled by forces loyal to President Bashar al-Assad.

According to Al-Jazeera, the extremists’ hold over territories in Damascus has “withered” due to counteroffensives launched the Syrian government and rebel groups.

Syria: Syrian military retake part of Yarmouk refugee camp

Prior to Isis’ presence, Yarmouk was under a government siege for nearly two years, with a report by The Independent finding women were being shot at by snipers if they tried to harvest plants to feed starving children.