Rebels in besieged areas of southwestern Syria say they are returning to negotiations with Russia over a possible pullout after an intensive bombing campaign by Russian and Syrian forces.
The move by rebel forces on July 5 comes after a brief suspension of the Moscow-brokered negotiations that have produced agreements already to return more than 30 towns to government control in the strategic zone of southern Syria bordering both Jordan and the Israeli-occupied Golan Heights.
A brief collapse of the talks on July 4 ushered in a blitz of Russian and Syrian air strikes, barrel bombs, and missiles, following a pattern Russia and Syria have pursued repeatedly to regain control over rebel territory.
The bombing barrage sent an estimated 320,000 civilians fleeing the area in what appeared to be one of the fastest displacements in Syria's seven-year civil war, prompting an international outcry and meetings at the United Nations.
Syrian President Bashar al-Assad's goal is to recapture Syria's entire southwest, one of the last rebel strongholds in the country.
Within 24 hours of the resumed bombing, rebels said they wanted to return to negotiations, with the talks focusing on their pullout from the territory they still control in Daraa's western countryside and the southern half of the provincial capital.
Daraa is considered to be the cradle of the 2011 uprising against Assad that triggered the devastating war, which has killed more than half a million people and displaced millions.
Hussein Abazeed, spokesman for the south's joint rebel command, accused Russia of pursuing a "scorched-earth policy" to force rebels back to the negotiating table.
As rebels agreed to renewed talks, the Syrian Observatory for Human Rights, a war monitor, reported a halt to both Russian and Syrian government air strikes over the south.
Rebels say Russia has insisted that opposition factions hand over their heavy weapons all at once, while rebels want to relinquish their arms in several phases.
Moscow also reportedly has refused rebel requests for safe passage to opposition-held territory in other parts of Syria, as was granted to rebels who agreed to pull out of Eastern Ghouta and Aleppo.
During the renewed fighting, regime forces retook control of a security checkpoint on the Jordanian border for the first time in more than three years, the monitoring group said.
Rebels then handed some 275 square kilometers of territory near the border to government forces without a fight, said observatory chief Rami Abdel Rahman.
Nearly 150 civilians have died since the government assault in the south began two weeks ago, according to the observatory.
Many of the area's 320,000 displaced people have been fleeing south to the borders with Jordan and the Golan Heights, the UN says.
But both Israel and Jordan have kept their borders closed, despite mounting calls to let Syrians escape to safety.
The International Rescue Committee said displaced families are struggling to cope with 45-degree heat, scorpions, and snakes in the open desert area.
Rebel territory in southern Syria was included in a cease-fire zone created last year in a deal between Washington, Amman, and Moscow, but that did little to halt the government's assault.
Near the start of the government's offensive, Washington indicated it would respond to violations of the cease-fire deal, but it has not done so yet and rebels said it had told them to expect no American military help.
The onslaught has sparked calls for restraint and an urgent meeting of the UN Security Council on July 5. UN Secretary-General Antonio Guterres warned that an "estimated 750,000 lives are in danger."
But Russia blocked the council from adopting a statement on the issue. A diplomat said on condition of anonymity there had been a fruitless push to persuade Moscow to accept a pause in fighting to distribute humanitarian aid.
