(USA TODAY) — A nurse in Japan told police that she sped up the deaths at least 20 patients to avoid having to tell families that their loved ones died while she was working, local media reported.

Ayumi Kuboki, 31, was arrested Saturday for the death of Sozo Nishikawa, 88, who was poisoned in 2016 with an antiseptic at Oguchi Hospital, The Asahi Shimbun and The Japan Times reported. According to the two Japanese news outlets, Kuboki told investigators that informing families of a patient’s death was a burden, and a task reserved for the nurse on duty.

In order to avoid the responsibility, Kuboki said she targeted patients near death so that they would die at a time when another nurse would have to tell the family, The Asahi Shimbun and The Japan Times reported.

Note: Read our discussion guidelines before commenting.