CNN cannot confirm casualties as access to the country has been severely restricted.

The deaths in Aleppo, according to the opposition, occurred when Scud missiles were fired Friday by government forces at rebel strongholds in predominantly residential neighborhoods.

The missile attack came a day after a series of car bombs targeted government buildings in the capital city of Damascus, including the headquarters of al-Assad's ruling party, and left at least 53 people dead and more than 230 wounded.

The United Nations recently estimated 70,000 people died in the fighting in Syria.