Two people were killed and two others critically injured in a head-on collision Monday morning on Route 4 in Mendon.

John Panouschek, 79, the driver, and Jean Panouschek, 74, both of South Woodstock, were killed in the crash Monday at about 10:20 a.m. Vermont State Police said neither was wearing a seat belt. 

Their Toyota RAV4 was headed west on Route 4 when it veered into oncoming traffic and collided head-on with a Toyota Sienna van, police said. The occupants of the van โ€” Beverlyย Adams, 73, the driver, and Thomas Allen, 76, both of Stockbridge โ€” were taken to Dartmouth Hitchcock Medical Center in Lebanon, where both were in critical condition. Both had been wearing seat belts, state police said.

The Panouscheks were pronounced dead at the crash site. Adams and Allen were extricated from their vehicle and taken to the hospital.

The state police crash reconstruction team is still investigating the circumstances of the crash, which occurred near Woodward Road.

Previously VTDigger's senior editor.