The deceased, identified as Satendra, lived with his family in MCD Colony near Azadpur, they said.
A passerby, who spotted the body hanging from the flyover at 6 am, informed the police.
No suicide note was found from the spot, the police said.
The body was handed over the deceased's family after a post-mortem examination and a probe is underway to ascertain the reason behind the extreme step, they said.
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