CARIBOU — The Maine Warden Service says a 14-year-old Delaware youth died after the all terrain vehicle he was riding went off a trail and hit a tree.

Officials say Kyle Hebert of Bear, Del., was riding on a sanctioned ATV trail in the town of Caribou at about 1:45 p.m. Sunday when he veered off a railroad bed and hit some trees.

Kyle was pronounced dead at a hospital.

Wardens say Kyle was riding with his grandfather and an older brother. They were on three machines. A younger brother was riding with their grandfather.

Officials say Kyle was not wearing a helmet and speed may have played a role in the crash.