According to media reports, fierce fighting took place on Friday throughout Aleppo province and the central city of Homs.
The chief UN monitor in Syria, Major-General Robert Mood, has accused both rebels and government troops of stoking violence in the country. He said that both of them are striving for military gains rather than peaceful transition.
Meanwhile, the New York-based Human Rights Watch (HRW) has said that Syrian forces are using “sexual violence” to torture men, women, and boys detained during the country's 15-month anti-government uprising.
In a statement released, the international rights group said that soldiers and pro-government armed militias are sexually abusing girls as young as 12 years old.
The report is based on interviews with former detainees who described being sexually abused or witnessing abuses, including rape, beatings and electric shocks.
HRW claimed that it has documented more than 20 incidents of sexual assault between March 2011 and March 2012.