A man informed the police that while he was returning home, he saw a man lying unconscious near Madangir market, they said.
The unconscious person was rushed to a hospital where he was declared brought dead. The deceased, identified as Ram Lal, had multiple stab injuries on his chest and abdomen, the police said.
Lal used to beg in the area for the last 30 years and was mentally unsound, they added.
Four suspects are being interrogated in connection with the killing.
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