The incident took place at around 3 am today, they said.
The security guard, identified as Satbir Singh, was beaten up mercilessly with bricks by assailants and sustained serious injuries, they said.
The place where the incident took place is about 500 metres away from the police station.
A probe into the matter is underway, the police added.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)