The 12:30 a.m. accident took place at the intersection of Route 347 and Route 111.

Police said Leonard Olmstead, 22, was driving his 2012 Audi north on Route 111, with a passenger in his car, when it was struck by a 1999 Volvo driven by a Connecticut man.

The Volvo driver, Todd Slater, 17, of Avon, Conn., "apparently ran a red light," Suffolk police said in a Monday news release. Slater was trapped in his car and had to be extricated by emergency workers. He was taken for treatment to Stony Brook University Medical Center where he was admitted in serious condition. Olmstead and his passenger were treated for minor injuries.

Detectives ask any witnesses to call the Fourth Squad at 631-854-8452. All calls will be kept confidential.

NewsdayTV's Doug Geed is heading 'Out East' to showcase the ultimate local spots you need to explore. Credit: Randee Daddona, Michael A. Rupolo Sr.

Out East Show: Visit The Shamrock evergreen maze, Sannino Vineyard, Seven Ponds Orchard and the Warrior Ranch Foundation NewsdayTV's Doug Geed is heading 'Out East' to showcase the ultimate local spots you need to explore.

NewsdayTV's Doug Geed is heading 'Out East' to showcase the ultimate local spots you need to explore. Credit: Randee Daddona, Michael A. Rupolo Sr.

Out East Show: Visit The Shamrock evergreen maze, Sannino Vineyard, Seven Ponds Orchard and the Warrior Ranch Foundation NewsdayTV's Doug Geed is heading 'Out East' to showcase the ultimate local spots you need to explore.

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