Police have accidentally deleted the DNA and fingerprint evidence of up to 800 terror suspects due to an administrative error.
The important material was accidentally thrown out because the correct paperwork had not been submitted, according to a report by the Telegraph.
Current rules state that evidence must be destroyed after six months if the subject has committed no offence.
However, special legislation allows for the information to be kept indefinitely if an application is made to have it deemed of national security importance. In this case the application was not submitted on time and the material was destroyed.
The error first came to light in March when it was reported only 450 files were affected, but a new report says the number of lost samples could be as high as 810.
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