India, Oct. 5 -- The National Investigation Agency (NIA) has filed a charge sheet against four accused persons, including Khalistani operatives, in a grenade attack at former Punjab minister and Bharatiya Janata Party (BJP) leader Manoranjan Kalia's residence in Jalandhar on April 8, the agency said on Sunday.

The charge sheet named Saidul Ameen of Amroha and Abhijot Jangra from Kurukshetra, who are in custody, and two absconders - Kulbir Singh Sidhu from Yamunanagar and Manish alias Kaka Rana from Karnal - before a Chandigarh court on Saturday.

A grenade was thrown at Kalia's residence around 1 am on April 8, damaging a glass partition at the entrance and a car and motorcycle parked there. Kalia and his family, who were home during the...