Both police constables involved in the incident were later sent to the district lines for their conduct, an official said.
The incident, which occurred in the morning, came to light after a seven-second video clip went viral over media. In the video, the two police constables could be spotted assaulting a bus conductor.
No case was registered in connection with the matter as the police claimed to have received no formal complaint.
It later emerged that a constable, identified as Neeraj, posted at Kashmere Gate Police Station, had an argument with a bus conductor at the ISBT over the latter's refusal to carry a parcel without any passenger on behalf of Neeraj.
Following the argument, Neeraj, along with another constable (also identified as Neeraj) posted in the same police station, thrashed the bus conductor.
"The constables have been sent to district lines and we are looking into the matter," DCP (North) Madhur Verma said.
