They captured part of the only road that runs from Turkey to the terrorist-held half of Aleppo, cutting its only supply route.
"The forward units of the army and militia have broken the siege of Nubel and Al-Zuhra… Terrorists have left these towns, but continue to pound the outskirts with mortar rounds and improvised rockets," a source told RIA Novosti on Wednesday.
Syria has been mired in a civil war since 2011, with the army fighting terrorist groups, such as Daesh (ISIL) and the Nusra Front.
On September 30, Russia began an anti-terrorist air campaign in the country at the request of Syrian President Bashar Assad.