Two small airplanes collided at the McCall Municipal Airport in Idaho Friday night, killing three people and injuring other three, officials said Saturday.

It appears that a Cessna 172 with two people on board struck another craft of the same type, as it was landing at the airport. The second plane had four people aboard, Federal Aviation Administration (FAA) spokesman Ian Gregor, said.

According to a statement of police and fire officials, 52-year-old Bill Keating, the pilot of the aircraft that was struck, was killed, as were two of his grandsons, ages 1 and 6. Three people were wounded, including a two-year-old boy who was saved from the burning wreckage by the other survivors. Both aircrafts exploded.

Justin Mooney, 30, the pilot of the landing aircraft, and passenger Mark Fuller, 27, were treated and released from McCall Memorial Hospital, a nursing supervisor said, according to the AP.

The McCall Municipal Airport in Idaho remained closed Saturday while the cause of the accident was under investigation. According to FAA spokesman Ian Gregor, the investigation could take months to conclude.    

“We will continue to interview witnesses and work with local police, fire and emergency first responders,” National Transportation Safety Board investigator Dennis Hogenson said, as quoted by the Idaho Press-Tribune. “We know two planes collided, and we secured lots of evidence today in an attempt to get an idea of exactly what happened out there,” he added.

McCall Municipal Airport has no air traffic control tower. “In a nutshell, it’s an uncontrolled airport,” Hogenson declared. “That means it’s the responsibility of pilots to communicate with one another and to avoid each other.”