(From BBC News)
Syrian government and Russian warplanes are reportedly pounding rebel-held areas of south-west Syria, after rebels said talks to reach a truce had failed.
A monitoring group said there had been more than 600 air strikes and barrel bombings in Deraa province overnight.
The attacks intensified after rebels rejected the terms of a ceasefire proposed by the Russian military.
At least 320,000 people have fled their homes since the government launched an offensive in the region two weeks ago.
Many of the displaced are stranded in makeshift camps along the borders with Jordan and the Israeli-occupied Golan Heights. Both countries have refused to allow mass influxes of refugees, sparking fears of a humanitarian crisis.