The military high command said in a statement reported by state media that "a regime of calm will be extended for a period of 72 hours from one o'clock on July 9," the Daily Star reported.
The previous truce ran up to midnight on July 8.
Ceasefire exclude terrorist group like ISIS (Islamic State, ISIL, IS and Daesh) and Nusra Front (Al-Qaeda Official wing in Syria).
Meanwhile at least 50 people were killed, including six children, in government-held parts of the northern city and more than 300 were injured when dozens of rebel-fired rockets fell on the area on Friday, the London based Observatory said.
Also Nusra Front positions in riverside area in the town of Darkush, near the Turkish border, in western Idlib province was targeted in the air strikes. Idlib province and city are under the control of rebel groups including the al Qaeda-linked Nusra Front.
On Thursday, government forces took a step toward completely encircling rebel-held parts of Aleppo, capturing ground overlooking the only road into the opposition half of the city and effectively putting those areas under siege.
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