More than 100 people have now been killed in a bombing campaign by President Assad and his allies, targeting the last major rebel-held area.
Eight months ago, the Russians and Turks agreed a ceasefire in Idlib with their troops monitoring a buffer zone around the province. The Syrian government and jihadist rebels blame each other for breaking the truce.
The Syrian army has now launched a ground offensive inside the buffer zone. At least 12 medical centres have been hit and more than 150,000 civilians have fled the fighting.
Filmed by Fadi Al Halabi. Produced by Kamal Kaddourah and Michael French.