Talks between Syrian opposition factions and regime ally Russia failed on Wednesday to reach a breakthrough over the embattled southern provinces of Daraa and Quneitra. About 90 minutes after the meeting was set to begin, the joint opposition faction command for the south announced the talks had "failed." "Negotiations with the Russian enemy in Busra al-Sham have failed, after they insisted on the surrender of heavy weapons," the command said in an online statement. Their spokesman Ibrahim Jabbawi said the talks had not produced "any results" because Moscow had insisted rebels hand over their heavy-duty arms in one go. "The session ended. No future meetings have been set," Jabbawi told AFP. Russia has been backing a two-week offensive by Syrian regime forces against the opposition in the Daraa and Quneitra. More than 30 towns have already agreed to return to regime control and talks were focused on remaining opposition-held territory in Daraas western countryside and the southern half of the city. Rebels met with a Russian delegation on Wednesday afternoon to deliver their decision on Moscows proposal for a regime takeover of the rest of the south. The Syrian Observatory for Human Rights, a Britain-based war monitor, said air strikes had stopped for several days to allow for negotiations.