Chhotu Singh was transporting 14 tonnes of ammonium nitrate in 280 bags with detonators, safety fuse wire and gelatin rods in a truck. He was caught near Khairwara turn in Dausa district, they said.
"The accused is being questioned on the source of the explosives, used in illegal mining. The destination or where the material was to be delivered is also being probed," police said.