The three-car crash occurred Saturday afternoon on Old Medford Avenue between Long Island Avenue and Peconic Avenue.
As of 5:20 p.m., police remain on location and Old Medford Avenue is closed. All three vehicles involved in the crash are still at the crash site. As the investigation continued past sunset, police also closed Long Island Avenue by Old Medford Avenue.
A spokesperson for the Suffolk County Police Department told OnSachem News information was not yet available for release.
Bystanders observing the investigation from outside the perimeter marked off with police tape said there was a police helicopter and one or more people fled the accident on foot. Police have not yet verified the information.
OnSachem will update this story once more information is confirmed.