Police have arrested the 29-year-old manager of an unlicensed nursery in Yamato, Kanagawa Prefecture, on suspicion of causing physical abuse that led to the death of a 2-year-old boy, police officials said Wednesday.

The child died Feb. 18, shortly after suffering a fractured skull at "Smile Mom Yamato Room," a nursery managed by Junko Izumo, a Yokohama resident, according to police.

Police believe Izumo physically abused the boy while he was at the nursery, causing serious damage to his skull. An autopsy suggested he had either been dropped from a height or hit around the head with a blunt instrument.

Earlier on Feb. 18, the boy's 25-year-old mother had visited the nursery to drop him off for the day.