A Minnesota teen who was found dead in November had accidentally suffocated in mud, according to a medical examiner's report released this week.

Hannah Oliva, 16, was found face-down in a farm field in November.

The Ramsey County medical examiner's office determined the death to be accidental, stating that Oliva suffocated because of mud and debris in her mouth and nose, according to the Free Press of Mankato.

Authorities expect to release a full report about Oliva's death in the coming weeks.

The teen's unexplained death was labeled suspicious at the time, because authorities could not find any visible signs of trauma.

Her car was located nearby, found unoccupied and stuck in mud.