JERSEY CITY, N.J. (PIX11) — The “suspicious” death of a 3-year-old boy in Jersey City was under investigation Tuesday, officials said.

The child was unresponsive when he was brought to Christ Hospital in Jersey City at 6:20 a.m., according to the Hudson County Prosecutor’s Office. The boy received treatment but was pronounced dead at 9:57 a.m., authorities said.

Officials did not release additional details about how the child died. The Regional Medical Examiner’s Office will work to determine the child’s cause of death.

The Hudson County Prosecutor’s Office Homicide Unit and the Jersey City Police Department are leading the investigation.