CALEDONIA, MN (WKBT) -

The Houston County Sheriff's Department have identified the 3  victims of a fatal plane crash in Caledonia.

According to a FAA spokesperson, the plane was traveling from Troy, Michigan to Caledonia, Minnesota when it crashed about 1 mile south of the Houston County Airport.  Killed in the crash were 79-year-old Joel Alan Garret of Troy, MI,  49-year-old Dale Edward Garrett of Berkley, MI, and 50-year-old John Parl Bergeron of  Birmingham, MI.

Four people were confirmed in the plane at the time of the crash. One person is in critical condition after being transported to a La Crosse hospital via Medlink.

Houston County Sheriff’s Deputy Kurt Kuhlers says a farmer saw an airplane in a field and called 911.  He says the debris area spans about an acre.

There is no word on what caused the crash at this time and there are no known witnesses.

Kuhlers said the National Transportation Safety Board (NTSB) and the Federal Aviation Administration (FAA) is currently investigating the crash.

Typically the NTSB is the one who investigates air crashes, airplane crashes, and during the course of that investigation, they are trying to find out what caused the crash and you know, get all the details from there," said Kuhlers.

Craig Hatch, air safety investigator with the NTSB started the investigation on Saturday.

In a news conference Hatch said he will focus on the background of the pilot, the scene itself and environmental factors at the time of the crash.

Hatch said it seems as though one of the wings hit first, but he said it's still too early to have any idea what caused the crash.

The NTSB said the four people on the plane were likely headed to South Dakota and stopping at the Houston County airport to refuel.

The  fixed wing twin engine plane is owned by Garlam Aviation Co. out of Troy, Michigan.

The NTSB investigates about 1400 aircraft accidents a year. Officials say last year, 250 of those were fatal crashes.