The consignment of explosives was seized last night near Timarlaga village while it was being supplied in a car from Bargadh (Odisa) to Chhatisgarh, Raigarh Additional Superintendent of Police Udaybhan Singh said.
Those arrested along with the consignment are Dharampal Nayak (40), Amundas Mahant (46), his employees- Shyamsagar Chauhan (26) and Ramesh Nishad (25), the ASP said.
The recovery includes 475 detonators, 500 gelatin sticks, 100kg ammonium nitrate and five bundles of fuse wire, the officer said.
The officer, however, did not rule out the connection of the Naxals with the explosives.
Further investigation would reveal exact origin of the explosives and where it was to be delivered, he said, adding that a probe was on.
A case has been registered in this connection and the vehicle has been seized, he said.