Police are investigating after a young man trespassing on railway tracks was struck and killed by a GO Transit train in Oakville early Friday.

Halton Regional Police say the incident took place around 2:30 a.m. near Speers Road and Fourth Line. The man, who police believe is in his 20s, has not been identified.

There were no passengers on the train at the time and the two crew members aboard were not injured.

Police say train service was restricted for about three hours but no train delays were expected to result from the incident.

The Halton region collision reconstruction unit is probing the incident with the help of CN Rail police and GO Transit safety officers.

With files from The Canadian Press