Hackers have claimed that a number of ISIS supporters' social media accounts are being run from internet addresses linked to the Department of Work and Pensions.
A group of four young computer experts who call themselves VandaSec have unearthed evidence indicating that at least three ISIS-supporting accounts can be traced back to the DWP's London offices.
Every computer and mobile phone logs onto the internet using an IP address, which is a type of identification number.
The hacking collective showed Mirror Online details of the IP addresses used by a trio of separate digital terrorists to access Twitter accounts, which were then used to carry out online recruitment and propaganda campaigns.
At first glance, the IP addresses seem to be based in Saudi Arabia, but upon further inspection using specialist tools they appeared to link back to the DWP.
"Don't you think that's strange?" one of the hackers asked Mirror Online. "We traced these accounts back to London, the home of the British intelligence services."
VandaSec's work has sparked wild rumours suggesting someone inside the DWP is running ISIS-supporting accounts, or they were created by intelligence services.
However, when Mirror Online traced the IP addresses obtained by VandaSec, they found they actually pointed to a series of unpublicised transactions between Britain and Saudi Arabia.
They learned that the British government sold on a large number of IP addresses to two Saudi Arabian firms.
After the sale completed in October of this year, they were used by extremists to spread their message of hate.
Jamie Turner, an expert from a firm called PCA Predict, discovered a record of the sale of IP addresses, and found a large number were transferred to Saudi Arabia in October of this year.
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