A London-based violence monitoring group reports that Syrian forces and rebels have been struggling for control of the Syrian village of Jamla, close to where the UN peacekeepers were detained.
A statement on the group's website said:
The Syrian Observatory received a footage reporting that rebel fighters will not released [release the UN personnel] until regular forces withdraw from the area.
The Jamla village and its surrounding areas have witnessed violent clashes in the past couple of days.
Rebel fighters from several factions took hold of the Mortar division and several checkpoints in Jamla.
More top news
Mild air but windy & wild
House of Cards actor Kevin Spacey is understood to be being investigated by British police over a second alleged sexual assault.
The biggish politics from the Budget is that there will be a £6bn stimulus in the year before Brexit and £10bn in the year after Brexit.