Rebels are reported to have taken control of a strategic military airbase in north-western Syria after days of fierce fighting with government forces.
Opposition activists said the Free Syrian Army (FSA) was in full control of Taftanaz airport. Videos purportedly showed fighters inside the facility.
Helicopters based there have been used to bombed rebel-held areas.
Meanwhile, top US and Russian officials are attending talks in Geneva with the UN envoy to Syria, Lakhdar Brahimi.