The arrested included the kidnap mastermind along with three country-made pistols, nine cartridges, four mobile handsets, a car and a motorcycle.
The businessman was kidnapped on October 11 from Narsiganj area and his kidnappers had demanded Rs two crore ransom to free him, Shahabad Range Deputy Inspector General (DIG) Mohammad Rahman said.
Later the kidnappers agreed to release the businessman on payment of Rs 27 lakh, which was was seized by the police along with Rs 1.9 lakh which was paid by his relatives.