The incident was reported yesterday evening when Rizwan (25) and his friend Ali (24) went to dump a rat, which had consumed poison, at a drain near their neighbour's residence.
The neighbour, who objected to the act, soon called two of his friends and the argument between the two groups turned violent, said a police official.
During the scuffle, the neighbour and his associates allegedly attacked Rizwan and Ali with knives. Locals called up the police and both the injured were rushed to GTB Hospital, where Rizwan was declared brought dead and Ali was admitted, said the official.
Rizwan was a carpenter by profession and lived with his parents and two younger brothers.