Nurse says she put disinfectant in drips

A nurse suspected of killing at least 20 elderly patients in a hospital in Japan has told investigators that she added disinfectant to their intravenous drips shortly before finishing her shifts because it was ‘‘a nuisance’’ to explain to relations when a person had died during her working hours. Ayumi Kuboki, 31, has been arrested on suspicion of killing Sozo Nishikawa, 88, at Oguchi Hospital, in the city of Yokohama, south-west of Tokyo, in September 2016. She is also being questioned over the death of Nobuo Yamaki, also 88, two days later. Since her arrest, Kuboki has admitted to police that she killed the two men as well as ‘‘about 20 other patients’’.