Security personnel conducted flag marches in sensitive areas in Punjab and Haryana following Saturday's violence by supporters of Dera Sacha Sauda chief Gurmeet Ram Rahim Singh protesting against registration of a fresh murder case against him.

Holi, the festival of colours, was on Monday celebrated with great enthusiasm and fervour across North India amid beefed up security arrangements.

Tension prevailed on Sunday in various parts of Haryana and Punjab, hit by violence following filing of a fresh murder case against the Dera Sacha Sauda chief, as authorities stepped up security measures to restore calm.

Resenting the filing of a murder case against the Dera Sacha Sauda head by the CBI, the sect supporters today went on a rampage setting ablaze four trains and around 37 vehicles, including 27 buses, and vandalised property in several places in Punjab and Haryana.

Curfew was on Monday relaxed by the authorities for some time as no untoward incident was reported in this industrial town, which witnessed violence over publication of a picture of Jesus Christ in an allegedly objectionable manner.