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
British pubs are still considered cornerstones of the community, but with an estimated 30 closures a week, is this tradition under threat?
The remarkable rescue of baby elephant Roi, who faced starvation after poachers killed its mother, was captured on film.
The judgment means obese workers in the UK could claim they are technically disabled and entitle them to benefits or to seek compensation.