The Syrian army and its allies have advanced deeper into rebel-controlled areas, taking over a major access road leading to Aleppo International Airport.
The army lost control of the strategic motorway to rebels four years ago.
Restoring full control over Aleppo would mark the biggest triumph yet for President Bashar al-Assad in a war that spiralled from protests against his rule in 2011.
Syrian forces have also made gains in rebel-held areas of Aleppo's Old City, thrusting deeper into opposition parts of the city in their relentless attack.
In north western Syria activists claim at lest three children and 18 others were killed in a series of airstrikes on the opposition controlled town of Kafranbel.
According to a UK based monitoring group, the strikes hit the town's main market place. Lat month Russia said it was resuming its airstrikes on the north western Idlib province. Kafranbel is not on any front line in the conflict.
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