The workers, who were protesting against farm laws, had brought tractor to the site on a truck. (File)
The Delhi Police on Tuesday arrested four persons, including Punjab Youth Congress (PYC) president Birender Singh Dhillon, in connection with the tractor-burning incident near India Gate, officials said.
"Four more persons have been arrested on Tuesday in a case registered at Tilak Marg police station. They have been identified as PYC president Birender Singh Dhillon, Indian Youth Congress (IYC) national general secretaries Harish Panwar and Abraham Roy Mani and IYC secretary Bunty," a senior police officer said.
A total of 10 people, including six on Monday, have been arrested in this connection.
The Congress' youth wing activists on Monday morning set a tractor ablaze near India Gate, a few hundred metres from the Rashtrapati Bhavan and Parliament, to protest the contentious farm laws.
Six of the PYC activists were arrested on Monday and police had also seized two vehicles in the matter.
Police had said that around 20 people carried a tractor on a truck to Rajpath, Man Singh Crossing, unloaded it from the truck and set it on fire.
According to police sources, the Punjab Youth Congress activists entered Lutyens'' Delhi along with a Punjab Police car.