Acting on a tip-off, a police team stopped the bus near Chandikhole, searched it and seized the explosives -- 5.5 quintal Sulphur powder, 2.4 quintal Aluminium Sulphate and 10 kg Magnesium.
"Such explosives are used to make bombs or hand grenades and similar types of works," said Jajpur Superintendent of Police, Deepak Kumar.
The explosive materials were found in some boxes which were kept on luggage area and covered with the tarpaulin atop the bus.
The driver, conductor and helper of the bus were detained for questioning.