At its height, five years ago, the so-called Islamic State controlled 88,000 sq km (34,000 sq miles) of territory, stretching from western Syria to eastern Iraq.

The jihadist group has now been contained to an area of less than half a square kilometre, according to its opponents.

Women, children, the injured and surrendered fighters are among those fleeing Baghuz, the Islamic State group's last remaining territory in Syria.