Two men are dead after they were pulled from a plane that crashed into Culver Reservoir Monday morning.

The crash was reported at around 7:45 a.m., according to the Larimer County Sheriff’s Office. The victims were pulled from the Cessna 172 after being submerged for 50 minutes.

They were taken to a nearby hospital, where they were pronounced dead.

Allen Jenitzer, a spokesperson for the Federal Aviation Administration, says they are looking into what caused the crash along with the National Transportation Safety Board.

Witnesses are asked to call the Larimer County Sheriff’s Office at 970-498-5172.

The NTSB says the plane's registration number is N2461N. It is registered to McAir Aviation out of Broomfield.

Culver Reservoir is located in Larimer County southwest of Berthoud.