At least three people were killed and more than a dozen injured in a grenade attack at Nirankari Bhawan gurdwara in Amritsar, Indian media reported on Sunday.
Around 250 followers of the Nirankari spiritual group, who are considered heretics by most Sikhs, had gathered for morning prayers in Amritsar's Adliwal village when two men reportedly arrived on a motorcycle and threw the explosive at them.
“Three people have died and 15-20 are injured,” senior police officer Surinder Pal Singh Parmar told reporters.
Nirankari followers are at odds with mainstream Sikhs who dominate in Punjab. Unlike most Sikhs, Nirankaris accept the authority of a living guru (spiritual guide). Its members also differ from other Sikhs in their disapproval of the militant brotherhood of the Khalsa.
Eyewitnesses said that the attackers also had assault rifles, The Hindustan Times reported. A witness said the attackers were wearing white and had covered themselves in shawls.
Police officer Dinesh Singh says the two masked men threw the grenade at a prayer hall. It exploded away from the main congregation in the compound, where hundreds of devotees were praying, he said.