Police are investigating a Thursday morning hit and run that left a pedestrian critically injured, according to a Baton Rouge Police Department news release.

The victim, a 46-year-old woman, was found lying in the southbound lane of the 5600 block of Plank Road around 4:35 a.m., the release says.

The woman was hit by an unknown vehicle which left after the incident, the release says.

The hit and run is under investigation.

Anyone with information is asked to call police at (225) 389-7819 or Crimestoppers at (225) 344-STOP.