Three persons were killed and four injured in an explosion at a shop dealing in ordnance scrap here on Saturday afternoon.
The explosion took place at the scrap shop located on GT By-Pass Road near Samrala Chowk, said Commissioner of Police Ishwar Singh.
One person died on the spot while two succumbed to injuries on their way to hospital.
Three of the injured were admitted to Apollo Hospital, and another to Civil Hospital, he said.
Ruling out any terrorist link to the explosion, he said investigations are on.
Forensic experts have been summoned from Chandigarh, he added.
The shop owner, Manjit Singh, has been arrested and booked under Section 304 of IPC (culpable homicide not amounting to murder), the police said.
The three deceased have been identified as Balbir Singh, Salig Ram and Shamshad. - PTI