British medical students feared to be in Syria
Nine British medical students and doctors are feared to have travelled to Syria to work in areas controlled by Islamic State militants.
The group, all in their late teens or early 20s, had been studying medicine in Sudan.
Some of their relatives, who have travelled to the Turkish-Syrian border, told the BBC they were gravely concerned about their welfare.
The medics are believed to have entered Syria more than a week ago.
Mark Lowen reports from Gaziantep, near the Turkish border with Syria.