The van carrying nine personnel was on special patrolling duty when the mishap took place between Gobindpur and Talabaracoat village road, about 15 km from here, police said.
Sub-Inspector Gopinath Baliarsingh (54), ASI Manoj Kumar Panda (45), ASI R P Swain, Assistant driver Azad Khand and Homeguard Sudhir Sahu sustained serious head and leg injuries and were shifted to SCB Medical Collage, Cuttack.
The other four were treated at a nearby hospital.
