Ashish Pandey, son of former Bahujan Samaj Party (BSP) MLA and MP Rakesh Pandey, whipped out the weapon in the hotel premises on Saturday night, the hotel said in a complaint made to the police.

"Ashish Pandey does not live in Delhi. He lives in Lucknow. We have sent a team to Lucknow to locate the man," a police officer told.

A case under the Arms Act has been registered against Ashish Pandey.

A video showing Ashish Pandey holding a pistol in his hand and catching the other man's collar with his left went viral on the video.

In the video, Ashish Pandey and his friends can be heard abusing a man who used the ladies' washroom, the police said.

Deputy Commissioner of Police Devender Arya said a complaint was received on Monday from the Assistant Security Manager of Hyatt Regency Hotel in south Delhi.