Amritsar, November 18: Three persons were killed and several others injured in a grenade attack on a religious congregation here on Sunday, police said.

The grenade was lobbed by bike-borne persons at a religious congregation of 'Nirankaris' which was being held at Adhiwala village here, according to eyewitness accounts.  "A grenade has been lobbed and 5-10 persons have been injured in the incident," a senior Punjab police official, who visited the incident spot, told reporters.

Three persons were killed in the incident, the official said. Punjab was on alert following an input claiming that “a group of six to seven JeM terrorists were reportedly in the state, possibly in Ferozepur area. Manipur: Grenade Attack by Militants in Assembly Complex, Three Injured.

The state was put on alert after four persons snatched a SUV from its driver at gunpoint near Madhopur in Pathankot district last week.