There was heavy fighting yesterday evening and last night, as the Syrian forces tried to retake the town, Rami Abdul-Rahman, director of the Syrian Observatory for Human Rights, said.
The Syrian troops are continuing their mopping-up operations to cleanse the area of the militants.
A leader of the Military Council of Qalamoun, a militant group, was killed in clashes and around eight others, including one of his assistants, were also killed in attacks, Abdul-Rahman added.
Earlier this month, the Syrian Army liberated Yabroud after months of battles for the strategically-located city, as it acted as a conduit for militant supplies from Lebanon.
RA/NJF