BUFFALO, N.Y. -- A 22-year-old died in a highway crash so violent, the vehicle he was driving split in two, with half rolling from the Kensington Expressway onto nearby Oakmont Avenue.

Police say Derek Kaczorowski was heading east on Route 33 when the Subaru he was driving hit one vehicle and sideswiped another. The vehicle then hit a tree and flipped several times.

He was pronounced dead at the scene.

Police said investigators are trying to determine if he suffered from a medical condition.