Syrian forces of President Bashar al-Assad are seen in the Nassib border crossing with Jordan in Deraa, July 6, 2018. Photo: Hezbollah Media / Handout via Reuters.

The Syrian government has given approval for the UN to deliver aid next week to thousands of civilians stranded on the Jordanian-Syrian border and threatened with starvation, aid workers and camp officials said on Wednesday.

A siege this month by the Syrian army and a block on aid by Jordan has depleted food at the camp in the Rubkan area of southeast Syria. That has led to at least a dozen deaths in the past week among its more than 50,000 inhabitants, mainly women and children, residents and UN sources told Reuters.

Rukban lies inside a “deconfliction zone” set up by US forces. Damascus says US troops are occupying Syrian territory and providing a safe haven for rebels.

UN officials have contacted local staff in the camp to say they have received authorization from Damascus to send an aid convoy on Oct. 25.

“The UN told us they would bring in aid … they have promised many times in the past but every time they say we were not able to come because the (Syrian) regime did not allow us,” said Oqba al Abdullah, a relief official in the camp.

“We hope this time it’s true.”

The UN children’s agency UNICEF warned last week that without aid the lives of thousands of children in the camp were at risk.

UN officials have been pressing Moscow to get its ally Damascus to agree to the aid shipment, a senior UN source involved in the operation told Reuters.

In the last three years, tens of thousands of people have fled to the camp from Islamic State-held parts of Syria being targeted by Russian and US-led coalition air strikes.

The Syrian army has tightened its siege of the camp, which is also near the Iraqi border, preventing smugglers and traders from delivering food.

Jordan agreed early this year to allow a one-off aid shipment but has said since it should not be held responsible as the camp is not on its territory and all future provisions must come from UN stores inside Syria.

The “deconfliction zone” is designed to shield US troops at the Tanf garrison and maintain for Washington a strategic foothold in an area close to a crucial supply route for Iranian weapons entering Syria from Iraq.

US-led coalition warplanes have several times struck Iranian-backed militias allied to Damascus, in what Washington has described as self-defense.

Senior Western diplomatic sources believe the siege of the camp is part of a Russian-led effort to put pressure on Washington to get out of Tanf.

US marines conducted rare military exercises in the area last month.