Aam Aadmi Party (AAP) leader HS Phoolka on Sunday stirred a controversy after he suggested that the Amritsar grenade attack on a religious congregation might have been "orchestrated" by the Army chief Bipin Rawat.

Three people were killed and over 20 injured when two motorcycle-borne men threw grenade at the Nirankari Bhavan's prayer hall at Adliwal village near Amritsar's Rajasansi. The police are treating it as a "terrorist act".

Commenting on the attack, Phoolka said, "Army Chief came and made a statement. To prove his statement, he might have orchestrated the attack. This matter should be looked into. Did the government do it? It is wrong to repeatedly say that Punjab's atmosphere is not good. We must get to the root of it."

He added that the no statement should be made blaming anybody before investigation.

"Those who made false statements about Maur blast, what action has been taken against them? What action has been taken against him? Punjab is a sensitive state. One must not make statements without facts. One must not make accusations. Get to the root of it - who did it? Why and how was it done? It's very important," he said.

The AAP leader was referring to twin blasts near the venue of a rally of a Congress candidate in Maur Mandi in Bathinda on January 31 2017, days before the Assembly elections. Seven people were killed and several others injured in a car explosion at Maur Mandi in Bathinda. The explosion had occurred near the venue of a poll campaign of Congress candidate Harminder Singh Jassi. The police had named two Dera Sacha Sauda disciples as accused in the case.

Phoolka's remarks on army chief were condemned by political parties. He, however, later said the statement was being "blown out of proportion and also regretted the remarks.

"Please see whole video. An inadvertent statement made standing on road is being blown out of proportion. I have stated that history is evidence of that fact that governments in the past have caused violence to further their interest. Like in last year’s Maur blast. No one should reach a conclusion without detailed impartial investigation. Even a moderate person like me who has always been against Khalistan-think so." he said on Twitter.

"I regret statement that may have purported to be against the Army Chief," he added.

General Bipin Rawat had recently warned that attempts were being made to revive insurgency in Punjab and he had even cautioned that people needed to be careful to prevent anti-national forces from succeeding.

Earlier on Sunday, Chief Minister Amarinder Singh condemned the Amritsar attack and said the possibility of the involvement of ISI-based Khalistani/Kashmiri terror groups could not be ruled out.

The DGP who visited the Nirankari Bhavan in the evening said the police was treating the incident as a "terrorist act" and denied that there was any "intelligence failure".