A man involved in a plane crash Monday evening has died of his injuries.

The man and a 9-year-old boy were critically injured when the plane went down near the Mascouche Airport, which is along Hwy. 640 near the juncture with Hwy. 25, around 5:15 p.m.

The boy is in stable condition in hospital.

There's no word on the cause of the crash, but the Transportation Safety Board and the SQ are investigating.