New Delhi, Sep 29 (IANS): A day after a group of Indian Youth Congress activists set afire a tractor in Delhi to register their protest against the three new agriculture-related laws, Delhi Police on Tuesday said it had detained Punjab Youth Congress chief Brinder Dhillon in the case.

The police said that its investigation in the case was underway and it was trying to identify others involved in the incident reported near India Gate on Monday.

Six persons were arrested after police registered an FIR under relevant provisions of the IPC, apart from the non-bailable Section in the Prevention of Damage to Public Property Act, and Disaster Management Act, and Epidemic Diseases Act.

"As many as six accused have been arrested so far and two vehicles seized," a senior police officer said.

Around 15-20 unidentified supporters and members of the Punjab Youth Congress had rallied at India Gate here on Monday to protest against the farm laws.