A major Syrian opposition body has announced that rebels have broken a government siege on the northern Syrian city of Aleppo. 

The Turkey-based Syrian National Coalition said on Twitter on Saturday: "Rebels break Aleppo's siege". 

The Ahrar al-Sham rebel group also posted on Twitter that rebels had seized control of Ramosa on the southwestern edges of the city and thereby "opened the route to Aleppo".

Syrian government forces encircled Aleppo on July 17 after closing off the last opposition-controlled route into the city.

Zouhir al-Shimale, a journalist in Aleppo, told Al Jazeera that the siege has "practically been broken". 

"It began at around 12pm local time when a car bomb exploded at the besieged end of the city," he said. 

"The Army of Conquest then raided the artillery base that the government forces took control of yesterday in Ramosa." 

Jabhat Fatah al-Sham said on Saturday that rebels pushing out from inside Aleppo city had linked up with those on the outskirts, according to AFP news agency. 

An estimated 250,000 civilians live in Aleppo's rebel-held eastern quarters.

Source: Al Jazeera and agencies