Acting on a tip-off, police intercepted the vehicle which was on its way from Udaipur to Barmer at a check post in Nosar village, SHO of Bayut Thana Manoj Mudh said.
About 405 bags of ammonium nitrate were seized and the truck driver, Panchuram Rajpurohit, and a trader Ishraram Jat were arrested, he said.
Further investigation was on.