Police seized one pistol, a live bullet, a khoka (remnant of fired bullet), a live bomb, a bike and three mobile phones from their possession.
The miscreants had hurled a bomb at a prawn enclosure in Hariabanka on May 5 after its owner refused to pay Rs 10 lakh demanded by the gang as extortion money. They had also fired on a police party that was chasing three of the gang on Thursday.
The arrested wrongdoers have been identified as Sheikh Mohammed, Sheikh Raisuddin, Debendra Chaudhury, Shankar Sethi and Subal Dalei.
The miscreants have been forwarded to court, Kendrapara SP Dayanidhi Gochhayat said.