Two people survived a plane crash in Marion County uninjured, according to authorities.

According to a news release from the Marion County Sheriff’s Office, a seaplane overturned after hitting water.

The Marion County Sheriff’s Office did not specify where the accident occurred.

Authorities said neither of the occupants of the plane suffered injuries and it is unclear if mechanical or pilot error caused the crash.

The crash remains under investigation by the Marion County Sheriff’s Office, FAA, Corp of Engineers and the Iowa DNR.

The Knoxville Township Fire Department, Knoxville City Rescue, and Marion County Emergency Management also assisted at the scene of the crash.