A case was registered after a group of people held up a towing van on traffic police duty in Thane after it took action against vehicles parked haphazardly near Upvan lake, a traffic police release said.

The incident occurred on August 19 when action was being taken against vehicles parked at the famous spot frequented by people on weekends. A group of people prevented the towing van from moving and heated arguments ensued with the staff, the release said.