What we know about deadly shooting at Wisconsin drag racing event

— -- A suspect is at large after three men, all believed to be gang members, were shot and killed Sunday at a drag racing event in Wisconsin.

Here's what we know about the investigation.

The shooting

The deadly shooting was reported at the Great Lakes Dragaway in Union Grove at 6:59 p.m.

The sheriff said today the suspect shot two victims and then followed the third as he tried to run away and shot him as well. The suspect then returned to the other two and shot them a second time, the sheriff said.

The suspect then fled, officials said.

No additional injuries were reported beyond the three people shot and killed, Sergeant Mark Malecki of the Kenosha Sheriff’s Department told ABC News.

The motive

Malecki told ABC News today the shooter remains at large and that the motive is believed to be gang-related.

Malecki said all indications are that the victims were targeted and this was not a random act of violence.

The victims

The victims were all believed to be gang members in Illinois, officials said at a news conference today.

Officials said today that the father of one of the three victims is believed to be a high-ranking member of an Illinois gang.

Officials said it's not clear why the shooting occurred at this event.

Officials said anyone with information is urged to come forward.