Four civilians were killed on Friday when Syrian security forces and regime agents used violence to disperse anti-regime protesters, human rights activists said.
"One demonstrator was stabbed to death in front of the Amneh mosque in Aleppo by pro-regime militiamen who entered the compound and attacked" the faithful, said Abdel Karim Rihawi of the Syrian League for Human Rights.
He said that dozens more were wounded or arrested.
In the central city of Homs, "one protester was shot dead by security forces who dispersed a demonstration in the Al-Khalidiyeh district," he added.
Rami Abdel Rahman, who heads the London-based Syrian Observatory for Human Rights, said: "Two protesters were killed by security force fire and others were wounded" at Mleiha in the Damascus region.
The activists said that security forces also fired on protesters at Idlib in the northwest, wounding several people.