Islamic State has claimed to have hacked Britain's Ministry of Defense and threatened to publish details of British military personnel.
The group, which calls itself the "Islamic State Hacking Division," made the claim after having published a "hit list" of over 70 U.S. military personnel online.
"In our next leak we may even disclose secret intelligence the Islamic State has just received from a source the brothers in the UK have spent some time acquiring from the Ministry of Defense in London as we slowly and secretly infiltrate England and the USA online and off," the group said in its online statement.
Claims that Britain's Defense Ministry was hacked are unverified and both British and U.S. officials have declined to comment on their authenticity.
Experts have suggested that the list of U.S. military personnel released in March was compiled from open source data such as news articles and military newsletters.