Syrian government airstrikes killed 43 people over Wednesday and Thursday, according to activists, the Christian Science Monitor reported.
The Syrian government hopes to reclaim control of the main road linking Damascus and Homs to the cities of Aleppo and Idlib after rebels captured Idlib last week, according to CNN.
The Syrian government has been fighting to regain control there ever the rebel takeover.
Human Rights Watch said the government used cluster bombs during the raids, which are especially dangerous to civilians, according to the Christian Science Monitor. The Syrian government denied using them.
According to activists, more than 33,000 people have died since the beginning of the Syrian conflict, the Christian Science Monitor reported.