A British news organization claimed to have obtained documents that contain at least 22,000 identities of Islamic State (IS) militants.

Britain's Sky News has reported that the tens of thousands of documents that contain the identities of the IS militants were passed to it on a memory stick.

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The said memory stick was reportedly stolen from the head of IS internal security police. It was not revealed who passed the memory stick and if Sky News had already sent a copy to authorities.

According to the British news organization, the documents it obtained contained real names, addresses, telephone numbers and family contacts of at least 22,000 IS militants.

The list include nationalities from at least 51 countries who had to reveal their most personal information as a requirement in joining the IS organization, Sky News added.

The documents also revealed the identities of previously unknown jihadists in the United States, Canada, North Africa, Middle East, Europe, and the United Kingdom.

It was not revealed if the list included IS militants coming from China.

Documents Include Names of IS Martyrs

Among the documents was a file that contains the names of so called "martyrs" who are ready to carry out suicide attacks after being trained to do so.

Sky News has confirmed that some of the telephone numbers found in the documents are still active.

As this developed, United States defense officials said US special forces captured Sleiman Daoud al-Afari, the head of the IS group's unit that develops chemical weapons.

Al-Afari was arrested in a raid in February in northern Iraq. The arrest was announced just the other day.

According to a New York Times report, Al-Afari admitted heading the IS unit, adding that the group had develop chemical weapons out of banned mustard gas. The gas had been converted into powdered form so that it can be launched using artillery shells.

TagsIS, Islamic State, IS Militants, islamic state militants, Sky News, IS Sky News