Lenexa ? Authorities on Sunday identified the three victims of a fiery five-vehicle accident on Interstate 435.

Police said Kenneth C. Harris, 22, of Overland Park was killed when his northbound van crossed the median into the southbound lanes. The van driven by Harris struck two other vans head on, triggering the five-car accident about 11:30 a.m. Saturday.

John A. Hilkenkamp, 52, of Fenton, Mo., was killed when his southbound van was struck by the van driven by Harris. Hilkenkamp’s wife and son were injured in the accident.

Janet K. McNamara, 58, of Lee’s Summit, Mo., was killed when Harris’ van hit her van. She was alone in the vehicle. McNamara’s van was pushed into a car driven by a Spring Hill woman, who was injured.

A fifth car was damaged by debris. All three vans burst into flames.

Witnesses told Kansas Highway Patrol troopers that Harris was slumped over the steering wheel seconds before he passed through the grassy median, which does not have a guardrail or steel barrier to separate the northbound and southbound lanes.