Syria Plans 'Day of Defiance'
Syrian activists are preparing to take to the streets on Friday for what they are calling a "day of defiance".
Tanks are reported to have withdrawn from the city of Deraa, where a human rights groups says the government has carried out a 10-day "massacre".
But security forces are reported to have gathered in other urban areas, including the coastal town of Baniyas.
More than 500 Syrians are thought to have been killed during attempts to quell seven weeks of protests.
At least 2,500 others have been detained as part of a violent crackdown that the US has described as "barbaric".
In cities across Syria protesters are calling for greater political rights and personal freedoms. Some are calling for the downfall of the regime of President Bashar al-Assad.
People are expected to gather again after prayers on Friday, which have become a regular focal point for protests in the Arab world in 2011.
The unrest in Syria poses the most serious challenge to four decades of rule by the Assad family in one of the Arab world's most tightly controlled countries.
Foreign journalists are not allowed to enter the country, so it is difficult to verify the reports of deaths.
One doctor, who said he planned to join those demonstrating, said the "indiscriminate killings and inhumane arrests have generated total disgust among the average Syrian".
"Soldiers with rifles no longer deter people. The propaganda that this regime is the only guarantor of stability no longer washes," he was quoted as telling Reuters.