Maharashtra Congress president Nana Patole has filed a Rs 500 crore defamation suit in a civil court here against IPS officer and former state intelligence chief Rashmi Shukla and others for alleged illegal tapping of his phone.

In the suit filed recently, Patole also sought a permanent injunction to stop the misuse of information collected through alleged illegal phone tapping. On Wednesday, civil judge V B Gore issued notices to Shukla and others and asked them to file a reply before April 12.