Regime forces raided neighborhoods in Damascus and the city's suburbs early Friday, according to the Local Coordination Committees for Syria, a network of opposition activists.
At least 113 people were killed across Syria on Friday, including 40 in Aleppo, according to the Local Coordination Committees for Syria, a network of opposition activists.
Opposition activist Tariq Abdul Haqq told CNN that rebels in northern Syria took 256 prisoners after a several-hour-long battle with government troops.
"I counted them one by one, soldiers and officers all inside a big abandoned building used by rebels as prison," he said, adding that the rebel offensive also secured heavy weapons and ammunition from government troop positions.
He said roughly 300 rebels on Friday seized three villages in the suburbs of the northwestern Syrian city of Jisr Alshugour, near the Turkish border.
CNN cannot confirm that account, or reports of violence or casualty counts in Syria because the government has restricted access to international journalists.