Syrian security forces have killed at least three protesters in the city of Homs, human rights activists say.
Amateur footage posted on social media sites purports to show demonstrations that took place earlier on Friday.
The reports of the killings come despite orders from President Bashar al-Assad not to open fire on demonstrators.
Activists say troops shot the protesters after Friday prayers.
The Syrian government made a similar promise in mid-March at the start of the uprising.
More than 850 people are believed to have been killed during the eight weeks of unrest and the military continues to be deployed in other towns and cities across Syria.
Meanwhile, Britain has summoned Syria’s ambassador and warned of new sanctions if the Assad’s regime does not end the violent crackdown.