(AP) WASHINGTON — US officials say the United States is finalizing plans to evacuate several hundred Syrian civil defense workers and their families from southwest Syria as Russian-backed government forces close in on the area.

Two officials familiar with the plans said Thursday that the US, Britain and Canada are spearheading the evacuation that would transport members of the White Helmets group to transit camps in neighboring countries.

From there, they will be sent to third countries, including Britain, Germany, the Netherlands and possibly Canada, according to the officials who spoke on condition of anonymity because they were not authorized to publicly discuss the matter.

It was not immediately clear if Israel had any role in the operation. The IDF maintains its side of the Quneitra crossing, and has used it to transfer supplies to refugees as well as to evacuate wounded Syrians for medical care.

The officials, and a member of the White Helmets who is due to be evacuated from Quneitra province, said the operation appears to be imminent as the Syrian army continues to gain ground in its latest offensive.

The White Helmets, who have enjoyed backing from the US and other Western nations for years, are likely to be targeted by Syrian forces as they retake control of the southwest, according to the officials.

The officials said planning for the evacuation has been taking place for some time but accelerated after last week’s NATO summit in Brussels.

“These are hard hours and minutes,” the White Helmets volunteer in Quneitra said, speaking on condition of anonymity for fear for his life. “This is the worst day of my life. I hope they rescue us before it is too late.”

The evacuation is expected to take place from Quneitra, which straddles the frontier with the Golan Heights and where the civil defense team is trapped. It is the last sliver of land still outside government control in the region.

Since the government offensive began in June, the area along the frontier with the Golan Heights has been the safest in the southwestern region, attracting hundreds of displaced people because is along the disengagement line with Israel demarcated in 1974 after the Yom Kippur War. The Syrian government is unlikely to fire there or carry out airstrikes.

On Tuesday, approximately 200 Syrians who were displaced by the recent onslaught approached the Israeli border, some of them waving white flags, in an apparent effort to get assistance from the Jewish state. Israel has refused to accept any refugees, including those seeking transfer to a third country.

Soldiers used bullhorns to tell them to back away from the fence.

“Go back before something bad happens. If you want us to be able to help you, go back,” an Israeli officer told the crowd in Arabic, according to Reuters. “Get a move on.”

An IDF spokesperson said this was due to concerns that they were approaching a live minefield near the border.

Negotiations are also ongoing to evacuate armed rebels and their families who don’t want to accept the return of the rule of Bashar Assad’s government to Quneitra, which the rebels have controlled for years. The fighters will be evacuated to the northern part of Syria, where the opposition still holds sway.

Except from that sliver of land, the southern tip of the southwestern region that lies along the border with Jordan and the Golan Heights is occupied by an Islamic State-affiliated group. The area is expected to be the target of the next government advances and the civil defense teams don’t operate there.

Syrian government supporters accuse the White Helmets, who only operate in opposition-held areas where government services are almost non-existent and aerial bombings are recurrent, of being politically affiliated with the rebel groups. Russia and the Syrian government have repeatedly accused them of staging chemical attacks in opposition areas, a charge that has never been proven.

They have continued to receive US support even as President Donald Trump presses ahead with his plans to withdraw all American forces from Syria as soon as Islamic State forces are routed.

In June, the State Department freed up a small portion — $6.6 million out of some $200 million — in frozen funding for Syria stabilization programs to keep the White Helmets operating through the end of this year.

In other parts of Syria, where government control has been restored, civil defense volunteers have almost always evacuated to other opposition-controlled areas. It is not clear why this time they will be evacuated out of the country.