Now ISIS threatens to kill British jihadis who want to return home:

British jihadis who want to return home are being threatened with death

Some had originally joined rebels fighting Syrian President Bashar al-Assad

They later became linked with ISIS but are now unable to quit terror group 

Comes after 19-year-old Mehdi Hassan was killed fighting for ISIS in Syria

Former Catholic schoolboy from Portsmouth travelled to country last year

Part of gang-of-five British jihadists seen on CCTV boarding flight to Turkey

Family said Hassan expressed his intention to return to UK in recent months

But claimed he was scared about repercussions and threat of terror charges

He tried to meet his mother at border but couldn't escape without passport

He was captured by ISIS and was imprisoned by the jihadists for four days

ISIS encourages its recruits to burn their passports as a sign of loyalty

Read more: http://www.dailymail.co.uk/news/article-2808015/ISIS-threatens-kill-British-jihadis-want-return-home.html#ixzz3HNNjKaTf