After arresting several DMK leaders and former ministers on charges of illegally appropriating prime property, Tamil Nadu Police party is now zeroing in on president M. Karunanidhi's son M.K. Stalin and grandson Udayanidhi Stalin.

A case was registered against Stalin, Udayanidhi Stalin, builder Subba Reddy, Raja Shankar, Venugopal Reddy and Srinivas for threatening and coercing one N. Seshadrikumar to sell his house here. Sources said Stalin may be arrested at any moment.