The Syrian army clashed with insurgents on the northern edge of Aleppo city on Friday, residents and activists said, threatening to take the last main rebel supply route into the city and trap opposition forces and civilians inside.

Although there are smaller, more indirect routes into Aleppo, taking the road would significantly reduce the rebels’ ability to resupply and it would also allow the army to besiege areas of the city which fell to insurgents two years ago.

“The road is completely closed and the regime has erected barriers,” said Muhammad Bidour, a 25-year-old activist opposed to President Bashar al-Assad. “Our comrades were there and had to take another very long road which takes hours.” […]