Syrian government forces are in position to target the final supply route to the rebel-held eastern districts of Aleppo after troops recaptured several strategic hills north of the city, reports say.
The advance is part of a broader government offensive to isolate the rebel stronghold, which began in earnest last week when troops supported by allied militias and backed by heavy Russian air strikes retook the villages of Nubul and Zahra.
The new positions south of Zahra allow forces to target the towns of Anadan, Hraytan and Kafr Hamra, Hezbollah's Al-Manar TV said.
Government forces were repelled in an effort to retake the hills earlier this week, the Britain-based Syrian Observatory for Human Rights said.
The Observatory reported heavy fighting between government and opposition forces a few miles south, around the town of Tamoura.