GO Transit has suspended service on part of its Lakeshore West Line in Burlington after a pedestrian was fatally struck by a train this morning.

It happened at Burloak Drive and Harvester Road, east of the Appleby GO Station, at around 7:40 a.m.

Service on the Lakeshore West Line was halted for several hours as a result. Full service resumed shortly after 10 a.m.

Metrolinx spokesperson Anne Marie Aikins said the suspension would likely hinder "thousands of passengers" during the morning rush.

“It’s been a very, very difficult week,” Aikins said, adding that the transit agency has seen three other fatalities on their tracks this week.

Scott Money, also of Metrolinx, said the circumstances surrounding the pedestrian's death are not yet clear.

"Unfortunately it has been a very tough morning for all those involved," he told CP24.

"We know having a service disruption can be very difficult and our thoughts go out to the families of the victim and all the first responders who were there today helping get people to where they needed to be as soon as they could."

Despite a few "minor delays," Money said the schedule should be back on track fairly quickly.