The four men were among a group of people who entered the farmhouse in Chhattarpur on Saturday morning, beat up men of Ponty's younger brother Hardeep, with whom the liquor baron had a dispute, and threw them out.
"We have placed them under arrest. A case of trespass, hurt, dacoity and abduction were registered earlier in connection with this incident," a senior police official said.
This incident had preceded the shootout later in the farmhouse in which Ponty and Hardeep were killed.
Ponty's men had on Saturday morning entered Chhattarpur farmhouse, beat up some of Hardeep's men, took away their mobile phones, confined them and threw out some others.
Tension was brewing between Ponty and his brother Hardeep for a couple of days before their killing.
