Amritsar grenade attack: Accused still at large

Grenade attack shook holy city of Amritsar on Sunday, killing 3 people and injuring 20; the National Investigative Agency began its probe in the case. Taking stock of situation, even Punjab Chief Minister Amrinder Singh is set to visit the site of attack.  The incident took place when two motorcycle-borne men threw grenade on a religious congregation on city outskirts. The police are treating the incident as a "terrorist act". No accused have been arrested till date