Computer hacker Gary McKinnon, an Asperger's sufferer who broke into US military computers, will not be extradited to the United States following a ten-year legal fight, Home Secretary Theresa May said Tuesday.

"Mr McKinnon is accused of serious crimes, but there is also no doubt that he is seriously ill," May told parliament, adding that extradition would breach his human rights by posing a high risk that he might attempt suicide.