Al-Jazeera Video: Syrian violence is open warfare says opposition

"The conflict in Syria is beginning to look more like an insurgency after government troops attacked the towns of Idlib, Homs, Deraa and Hama.

Army defectors retaliated by killing a senior army officer in an ambush which they have described the fighting as "open warfare".

As many as 27 people have been killed in the latest clashes.

Al Jazeera's Nazanin Sadri reports."