Syrian security forces are said to have shot dead 11 mourners in the central city of Homs at a mass funeral yesterday.
Ten of the 44 people killed in Friday's crackdown on protests against President Bashar al-Assad were being buried.
Human rights lawyer Razan Zaitouna said she had the names of at least 11 people killed at the funeral at Nasr cemetery.
'The shooting was in cold blood. People were streaming peacefully out of the cemetery,' she added.
A witness said the mourners shouted 'overthrow the regime' and that they came under fire as they were leaving the cemetery 8km north of the centre of Homs.
Dozens of mourners were said to be wounded in the attack that occurred at around 1200GMT.
Syria has barred most international media since the protests broke out two months ago, making it impossible to verify independently accounts from activists and officials.
Another resident of Homs said heavy machinegun fire was heard at night from the Bab Amro area, where tanks were deployed earlier this month to crush growing demonstrations against Assad's autocratic rule.
Security forces killed another protestor, named Ziad al-Qadi, when they fired live rounds at a demonstration in the Damascus suburb of Saqba, a witness said by telephone.
'A large demonstration calling for the overthrow of the regime had been going on since the afternoon. It felt like the whole of Saqba took to the streets. Security forces entered in the evening and started firing,' said the witness.
The latest violence came as the Syrian National Organisation for Human Rights said security forces had killed at least 44 civilians on Friday in attacks on pro-democracy demonstrations across Syria.
The protests broke out in defiance of a military crackdown that another rights group says has killed more than 800 civilians in the past nine weeks.
Assad has largely dismissed the protests as serving a foreign-backed conspiracy to sow sectarian strife.
Syrian authorities blame most of the violence on armed groups, backed by Islamists and outside powers, who they say have killed more than 120 soldiers and police. They have recently suggested they believe the protests have peaked.
Syria said yesterday armed groups killed 17 people on Friday in the provinces of Idlib and Homs to the south.
