Within minutes of the young woman being carried into the Turkish hospital just over the border from Syria, it became clear that her shattered skull, concealed by bloodied bandages, was too serious for the small state facility to treat.

The unconscious woman in her 20s, whose name was not known, was another victim of the increasingly bloody clashes between Islamic State militants and Kurdish forces for control of the Syrian border town of Kobani, 10 km (six miles) to the south.

Monitors estimate several hundred have died on each side since the upsurge in violence began more than two weeks ago.