The four security personnel are battling for life in Chandigarh PGI, police said here.
The accident took place when Ranike was going from Delhi to Chandigarh via Banur-Landran-Mohali road.
As his cavalcade reached near Saneta village a car coming from opposite direction collided head-on with the pilot vehicle, leaving four security personnel sitting in the vehicle injured, police said.
Injured policemen-- Bakshish Singh, Dilbagh Singh, Baljeet Singh and Gurmeet Singh were rushed to PGI and their condition is said to be critical.