The largest offensive in years by Syrian opposition fighters against government forces has stirred fears of reigniting a civil war that has been mostly frozen for years.
The new rebel push began Wednesday in Aleppo Province in northwestern Syria.
On Thursday, the opposition forces advanced, capturing several new villages, according to a British-based monitoring group, the Syrian Observatory for Human Rights.
The offensive aims to stop attacks by government forces and their Iran-backed militia allies, a rebel commander said.
The group gathers information from a network of activists and others across Syria, and its numbers could not be independently verified.
Organizations:
Syrian, Human Rights
Locations:
Aleppo Province, Syria, British, Iran