Syrian rebels on Friday seized back territory from regime forces north of Aleppo, stymieing government efforts to sever a key opposition supply route into the city, an activist group monitoring the war said.

The Syrian Observatory for Human Rights said rebel forces had taken back the strategic Mallah Farms area outside the city, as well as several villages seized by government troops in an offensive that began Tuesday.

The advances were a setback for the regime, which had hoped to block the highway leading to the Turkish border from the rebel-held east of Aleppo. […]