iStockA 4-month-old girl and her 14-year-old sister were found dead in the garage of their southern California home in a suspected homicide, and their mother has been named a person of interest, authorities said.

Police in Ontario, California, said the girls’ identities and cause of death has not been released.

Their mother was taken to a hospital on Tuesday, police said. On Wednesday authorities said she’s considered a person of interest.

Ontario police are expected to hold a news conference on Wednesday to release additional details.

One local resident described the neighborhood as very safe.

“You can walk out at 2 in the morning and feel safe here,” the resident told ABC Los Angeles station KABC-TV. “Nothing like this has ever happened.”

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