Nineteen people have been stabbed to death as they slept at a centre for disabled people in Japan's worst mass killing in decades.
Police arrested 26-year-old Satoshi Uematsu, who was a former employee at the facility, after he handed himself in.
The suspect had been involuntarily committed to hospital for two weeks earlier this year after he tried to present a letter to the speaker of the lower house of Japan's parliament, in which he expressed a willingness to kill disabled people if the government approved.
At least 25 other residents of the centre in Sagamihara - about 20 miles southwest of Tokyo - were wounded during the attack, 20 of them seriously.