Police official Mustafizur Rahman identified the victim as 40-year-old Niloy Chowdhury and said he was hacked to death in his apartment. The motive was not immediately clear.
The victim's family said his real name was Niloy Chottopadhay and that he used a different name on social media.
Asha Moni, the victim's wife, said at least four young people attacked her husband.
