The incident took place yesterday when Sub-Inspector Pradeep Kumar, who had gone to clear the traffic congestion in Kosi town, found the construction material lying on road, police said.
"Following a heated argument between the two, Rahis, the watchman of the building hit Pradeep on his nose with a brick resulting in the policeman suffering heavy bleeding," said SSP Babloo Kumar.
"Rahis has been arrested and booked under sections 307, 332, 353 and 186 of the IPC," he added.
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