National Secretary of LJP Ravi Tickoo was stopped by the four accused when he was on way to his residence along with his driver in a vehicle on Sunday.
They started beating Tickoo mercilessly and later snatched his mobile phones and money before fleeing from the spot.
Acting on a complaint filed by Tickoo, police last evening arrested Raju, Balwant Singh, Upkar Gupta and Narinder Singh.