Idlib province, in northwestern Syria, is mostly controlled by several rebel groups.
It was the scene of protests and heavy clashes during the early phase of the country’s civil war and eventually became almost fully controlled by rebel groups.
Rebel fighters and civilians evacuated from the last rebel-held area in Homs have been moved to several parts of Idlib province, including Idlib city.
Last week, a suspected chemical weapons attack on the rebel-held town of Khan Sheikhoun killed at least 87 civilians.
For an overall view take a look at our Syria: Who controls what map.