Three people have been arrested in connection with the murder of an eight-year-old boy in Barishal's Ujirpur upazila, police said on Tuesday.

The deceased was identified as Dipto Mandal, son of Dipak Mandal from Harta union. His body was found stuffed in a sack in a pond around 5.30am on Tuesday, four days after he went missing.

The arrestees have been identified as Ratan Biswas, his wife Eva, and Nayan Shil, said Ali Arshad, officer-in-charge of Ujirpur police station.

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The boy went missing from his house around 11pm on Friday. The next day, his father Dipak filed a missing person's complaint at the police station, the OC said.

“In the early hours of Tuesday, locals and his family members nabbed Ratan and Nayan suspecting their role in the boy's murder. The two have admitted to killing the boy and dumping his body in the pond," he added.

The body has been sent for post-mortem, he said.