BELGRADE – Leaked Islamic State registration forms have revealed the identities and addresses of 22,000 jihadists and potential suicide bombers, reports.

The documents list jihadists from at least 51 countries, including the UK and the United States, as well as personal details like their phone numbers and family contacts.

Tens of thousands of documents were reportedly handed to Sky News UK by a dillusionioned ISIS recruit.

While the documents list many well-known jihadis like Abdel Barry and Junaid Hussain, they have also revealed the identities of previously unknown recruits across Europe, in the US and Canada.

There were also documents titled ‘Martyrs’, which listed a group jihadis who were specifically trained to carry out suicide attacks.

As well as revealing identities, the documents showed that many of the unknown fighter had passed through jihadi ‘hot spots’ like Yemen, Sudan, Libya, Pakistan and Afghanistan on multiple occasions to fight in Syria and return home on multiple occasions.

Many of the phone numbers on the list are reportedly still active, with Sky News reporting that it is believed that a significant number of them are still being used by the jihadis.

A former Free Syrian Army fighter who was recruited by ISIS, who called himself Abu Hamed, handed Sky News the memory stick which contained the files allegedly stolen from the head of ISIS’ internal security police.

The detailed data is divided into 23 categories, including previous fighting experience, special skills, who they were recommended by, and countries travelled through.

MI6’s former global terrorism operations director Richard Barrett told Sky News that the files were a “fantastic coup”.

“And it will be an absolute goldmine of information of enormous significance and interest to very many people, particularly the security and intelligence services,” he said.

“There hasn’t been anything at all like this since the discovery of the Sinjar records in 2007 and that only covered about 700 people (ISIS fighters entering Iraq), all of whom were from Arab countries.”

Royal United Services Institute counter-terrorism expert Afzal described it as the “most significant intelligence” they have received about ISIS.