and family contacts of Islamic State fighters, have been obtained by a British broadcaster.

Sky News reports that nationals from more than 50 countries, including Britain, had

to give up their most personal information as they joined the terror organization.

Some of the names are well known to intelligence agencies but the documents reveal of the identities

of a number of previously unknown jihadis from western and Middle Eastern countries.

The papers show many of the men passed through a series of jihadi "hotspots" - such as Yemen,

Sudan, Tunisia, Libya, Pakistan and Afghanistan - on multiple occasions, but were apparently

unchecked, unmonitored and able to both enter Syria to fight and then to return home.

The files were given to Sky News by a former senior member of ISIS.