On Wednesday, they seized the key town of Khan Sheikhun from jihadists and allied rebels, and on Friday overran the countryside to the south of the town, encircling a Turkish observation post there. On Saturday, loyalist fighters gathered north of Khan Sheikhun, the Syrian Observatory for Human Rights said. On Saturday, heavy bombardment hit the region in an apparent preparation for a further push north, Abdel Rahman said.
An AFP correspondent saw thick grey smoke billow up into a clear blue sky after a strike on the outskirts of Maaret al-Noman. After Khan Sheikhun, Maaret al-Noman is the next town on a key highway running across Idlib province that analysts say is coveted by the regime. Full government control of that road would allow it to connect the capital Damascus with second city Aleppo, retaken from opposition fighters in late 2016.
Also Saturday, a car bomb in Idlib city killed two people, the Observatory said, but there was no immediate claim of responsibility. Turkish troops have been deployed at a dozen points around the Idlib region of some three million people, in an attempt to set up a buffer zone to protect the area. Syria's war has killed more than 370,000 people since starting with the brutal repression of anti-government protests in 2011.