Four persons have been arrested in the case.

After receiving the call late Wednesday night, Assistant Sub Inspector Jaswant Singh and two constables headed for the bash, being held in Gali number 13, Gorak Park, in northeast Delhi.

The job at hand was simple, or so the policemen thought: simply ask the DJ to wind down. Instead, the three found themselves in the nearest hospital after some youths, drunk on alcohol and lawlessness, beat them up, the police said.

Besides ASI Jaswant Singh, Constables Subhash and Satya Narayan were injured in the ‘bash-up’ at the bash. The three were released after medical check-up at a local hospital.

At the venue, “when the police personnel asked the DJ to stop playing music as it is against the law to play loud music after 10 pm, some inebriated party-mongers asked them to leave straightaway,” a senior police officer said. “When the officials persisted that the DJ wind up his business, the revellers beat them up.”

The officer said the youths repeatedly pounded the policemen with rods — ASI Singh received head injuries, while the two constables sustained fractures on their arms. The youths then damaged the police officials’ wireless set and also broke the headlights of their patrolling motorbikes.