The deceased was identified as Billal Hossain, son of Mostafa of Khedapur village in Manirampur.
Jashore's ASP Ansar Uddin said that Billal kidnapped Tarif Hossain, a fourth-grade student of Gopalpur Primary School in Monirampur, on Sunday. He then demanded ransom worth Tk 5 lakh from his family.
Police detained Billal on Tuesday, while he went to a bKash shop in Keshabpur to withdraw the ransom money.
Later, according to his information, police went to recover the body of Tarif from the bridge on Kamalpur road on the night.
During this time, Billal's associates opened fire on police, prompting them to fire back, triggering a gunfight. During the gunfight, Billal received a bullet and died on the spot.
After the gunfight, the body of Tarif was recovered from the bottom of the bridge. The bodies of Tarif and Billal was sent to Jashore hospital morgue.