The traders lodged a complaint at the Sohrab Gate Police Outpost last evening against the minister's son Bhura, Circle Officer Dinesh Chand Shukla said.
They claimed that the incident occurred after Bhura's car got stuck in traffic at the market place, he said.
The complainants alleged that bouncers accompanying the accused assaulted a shokeeper and then Bhura threatened them by wielding a pistol, the circle officer said.
He said a case has been registered in the matter.