Police in Omagh reported that a number of people had been “prodded” from a passing vehicle.
Steven McTeague died three days after an incident at the factory in July 2016.
The 22 year old was driving on the Beltany Road, near the junction with the Drumlegagh Road.
Police are investigating a link with a similar incident in Maguiresbridge on Friday night.
Tyrone GAA bosses look likely to launch an investigation into a mass brawl which broke out at a club championship game on Friday night.