The head of maintenance at McCall’s Municipal Airport says a collision between two small planes last week that killed three people happened after both pilots apparently attempted to land at the same time.

The Idaho Statesman reported that both planes were on approach traveling the same direction when they collided on Friday. The National Transportation Safety Board is expected to release a preliminary report on the crash later this week. Investigators say it’s unclear whether the two Cessna 172 aircraft collided on the runway or in the air.

Killed were McCall public works director Bill Keating, 52, and two of his grandsons, ages 1 and 6. A third grandson, age 3, was taken to a Salt Lake hospital for burn treatment.

(AP)