HERMON, Maine (AP) — A Maine man and his son have died in a snowmobile crash in Hermon.

It's the third snowmobile fatality this weekend in Maine.

The Maine Warden Service say 33-year-old Jason Tracy of Hermon and his 10-year-old son were killed when the snowmobile they were riding hit a tree on the edge of a field early Sunday morning.

The crash happened around 1 a.m.

Warden Lt. Dan Scott says speed and alcohol were contributing factors in the crash, which is still under investigation.

Officials say the boy was wearing a helmet; Tracy was not.

The Warden Service is reminding riders to slow down, never drink and drive and be conscious of hazards and other riders on the trails.