Police Bureau of Investigation (PBI) in Bagerhat on Tuesday night detained three people, including the younger brother of the deceased, for their alleged involvement in murdering mill worker Kabul Mollah in Morrelganj upazila on January 20.
The arrestees are slain Kabul's younger brother Babul Mollah, son of Abdul Gaffar, Bachu Hawladar, son of Abdul Majid, and Munna Khan, son of Montu Khan, of Altiburujbariya village.
During primary interrogation, the detainees confessed their involvement in Kabul's murder, Bagerhat PBI Inspector (Administration) Mohammad Mohsin Uddin said.
Later, according to their information, police recovered an iron rod and a knife used in the murder, he said, adding that they might have committed the murder in a bid to implicate their rivals in false case.
On January 20, criminals hacked Kabul to death in a planned way and dumped the body inside a shrimp enclosure at Altiburujbariya village, Inspector Mohsin said.
Being informed by locals, police recovered Kabul's body the following day and sent it to the hospital for autopsy.
On January 22, slain Kabul's father Abdul Gaffar filed a murder case with Morrelganj Police Station accusing four neighbours --Abdur Rob, 57, his son Yamin Shikder and son-in-law Nurul Islam and Khabir Mollah, 47, son of Sultan Mollah.
The case was handed over to PBI, Bagerhat branch, on 28 January.
After a long investigation, a team of PBI led by Sub-Inspector Shahidur Rahman raided Kalijira Bridge area in Barishal and detained the three, said the PBI inspector.