WATSONVILLE, Calif.—A woman and her adult daughter have been arrested after an infant died at an illegal day care they were running in central California, authorities said.

Deputies responded around 10:30 a.m. Saturday, following reports of a baby not breathing at a home in Royal Oaks, according to a statement by the Monterey County Sheriff’s Office.

The 3-month-old child was pronounced dead at a hospital, the statement said.

Up to 30 children were inside the residence near Watsonville, on the state’s central coast, sheriff’s officials said.

A 62-year-old woman and her 35-year-old daughter, both residents of Royal Oaks, were arrested for investigation of allegations including suspicion of involuntary manslaughter, child abuse, and operating an unauthorized child care facility, officials said.

Their bail was set at $50,000 each.