One person was killed and three others were injured after two small planes collided while attempting to land at a Colorado airport on Sunday.

       A Cessna 172 and an Extra Flugzeugbau EA300 were both approaching Fort Morgan Municipal Airport when they struck each other mid-air, according to the Federal Aviation Administration (FAA).

       The Morgan County Sheriff's Office said the Cessna was on final approach to the airport when it was struck mid-air by a second small plane, each carrying two people, then crashed and caught fire.

       Authorities said they received a report of the crash at around 10:44 a.m. local time.

       Deputies from the Morgan County Sheriff's Office, officers from the Fort Morgan Police Department, Colorado State Patrol, Fort Morgan Fire Department and Morgan County Ambulance responded to the scene.

       Two occupants of the Cessna sustained minor injuries and were treated at the scene, while one occupant of the second plane was taken to a local hospital.

       The fourth person was pronounced dead at the scene by the Morgan County Coroner's Office, officials said.

       The FAA and National Transportation Safety Board (NTSB) are investigating the cause of the collision. The names of those involved have not yet been released due to the ongoing investigation.

       "We extend our deepest condolences to the family and friends of the victim in this tragic event," the sheriff's office said in a statement. "We would like to express our gratitude to all the agencies that helped with this situation. Additionally, we want to thank the citizens who assisted in trying to extinguish the fire until the fire department and first responders arrived on the scene."