A knife-wielding former employee killed 19 people and injured 25 at a care centre for the mentally disabled in Japan on Tuesday, in the country's worst mass killing in decades. The 26-year-old man later turned himself in at a police station, admitting to officers: "I did it." He reportedly also said: "The disabled should all disappear." Authorities identified the attacker as Satoshi Uematsu and said he had worked at the facility in Sagamihara, a city of more than 700,000 people west of Tokyo, until February.