"There's heavy army presence, and soldiers are conducting door-to-door raids," he told the Associated Press.
Door-to-door raids, arrests latest effort to quash uprising →
Other protests were around the northeastern city of Qamishli, where about 5,000 people marched in the streets chanting "Freedom!" and "Freedom to political prisoners!" said rights activist Mustafa Osso.
Syrian troops fire at protesters, killing 6 →