The UN's Syria envoy voiced hope Tuesday that peace talks could restart next month, as U.S. Secretary of State John Kerry said there had been "progress" in efforts to salvage an urgently-needed ceasefire.
UN envoy Staffan de Mistura has struggled to keep the peace process alive amid a surge in fighting between Syrian President Bashar Al-Assad and rebel groups.
The fighting persisted Tuesday, with government forces seizing a rebel-held neighborhood on the northwest outskirts of Aleppo, tightening their siege of the opposition-controlled parts of the city.
The government also carried out renewed barrel bomb attacks on opposition-held districts, a day after bombardments that killed at least 24 people, a monitor said.
As the bloodshed continued, de Mistura met with U.S. Syria envoy Michael Ratney and deputy Russian foreign minister Gennady Gatilov, part of a bid to salvage diplomatic efforts to end more than five years of brutal conflict.
"Our aim is to proceed with a third round of intra-Syrian talks towards the end of August," de Mistura told reporters after the meeting.
While de Mistura has said he would prefer to negotiate with a real ceasefire in place, he conceded that may not be realistic.
"The talks are not going to wait for improvement in Aleppo or in Damascus," he said.
The UN-backed talks are aimed at reaching a political settlement to Syria's five-year war, which has left more than 280,000 people dead and driven millions from their homes.
The last round of talks, which began in April, was meant to focus on the issue of political transition in Syria, but the Damascus delegation has called for a national unity government, an idea which the opposition rejects, demanding President Bashar Al-Assad leave power.
The Geneva meeting on Tuesday came hours after higher-level negotiations on the sidelines of an Asia summit in Laos.
In Vientiane, Kerry said Washington was "making progress" with Russia on Syria cooperation following a meeting with Russian counterpart Sergei Lavrov.
Russia and the United States support opposing sides in Syria's civil war.
Kerry held marathon talks with Russian President Vladimir Putin and Lavrov in Moscow last week.
They agreed "concrete steps" to revive the ceasefire and tackle jihadist groups in Syria, although details have not been made public.
Kerry said on Tuesday that bilateral work was inching forward and that an updated diplomatic plan for Syria could be unveiled "somewhere in early August."
"What we're trying to do is strengthen the cessation of hostilities, provide a framework which allows us to actually get to the table and have a real negotiation," he said.
AFP contributed to this report.