(La Porte, IN) - The driver of a passenger vehicle involved in a weekend collision with an ambulance in La Porte has died.

According to La Porte City Police, Rachel Johnson crossed the center line and struck the oncoming ambulance at Rose and Adams streets.  The ambulance was disabled from the crash.

A second ambulance was called for Johnson who suffered a medical emergency while being treated, police said.   She was pronounced dead about one hour after the crash despite life saving efforts.

Currently, the cause of death is not known but it’s under investigation by the La Porte County Coroner’s Office.  Police said a medic involved the crash suffered only minor injuries.

La Porte County Emergency Medical Service Administrator Eric Fenstermaker said there was no patient in the ambulance involved in the crash.  The ambulance was returning from a call when the accident happened.

Police said the Saturday morning accident remains under investigation.