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Narcan

A woman holds up a tube of Naloxone Hydrochloride, or Narcan, a nasal spray used as an antidote for opiate drug overdoses. (AP Photo/Charles Krupa)

ST. LOUIS COUNTY — An 8-month-old had to be revived with Narcan Wednesday after arriving at a hospital, and remains in critical condition, according to St. Louis County police.

St. Louis County detectives were at Christian Northeast Hospital investigating another matter Wednesday night when they saw a car speed onto hospital grounds and its driver carry a baby boy into the emergency room, according to department spokesman, Sgt. Benjamin Granda.

Detectives have since determined that the child was exposed to an opioid at a home in the 12300 block of Rocket Drive in north St. Louis County.

Granda said no one has been arrested, but added: "Detectives have been in contact with those responsible for the care and custody of the child."

This is a breaking story, check back for updates.