UPDATE: Williams Grove Speedway has cancelled Saturday races

Friday night races were cancelled at Williams Grove Speedway after a driver died during a multi-vehicle collision that occurred in warm-up laps before one of the scheduled races. The Cumberland County coroner's office confirmed the accidental death late Friday.

Accident details were not immediately available, however a speedway employee said that one driver was killed in the on-track accident that apparently involved three vehicles about 7:30 p.m.

A social media correspondent who planned to report race highlights from the popular Monroe Twp., Cumberland County dirt track Friday night identified the deceased driver as Jim Campbell, of Feasterville, Bucks County.

Campbell is not a regular driver at the track, according to PennLive's Jeremy Elliott.

The accidents occurred during what are known as "hot laps," which give the drivers the chance to test their cars and get familiar with the track conditions at near race speed.

Immediately after the crash, a medical helicopter was dispatched to the scene. But that crew was waved off upon its arrival at the track, as officials built a makeshift barrier around Campbell's vehicle.

The Cumberland County Coroner's office has been dispatched to the scene, and the investigation is continuing.

Hundreds of somber fans filed out of the normally raucous grandstand on what had been scheduled as "Kids Night," many shaking their heads in sadness and shock, after track officials closed for the night.

Campbell's death is the first fatality at Williams Grove since Sept. 2, 2007, when driver Billy Kimmel, 27, of Mechanicsburg, was killed in a crash during a 25-lap feature event.

PennLive reporter Charles Thompson contributed to this report.

This post was updated at 10 p.m. with videotaped comments from one of the spectators at Williams Grove Speedway, recounting some of what she saw.