Amritsar Blast: Several injured in blast at Amritsar's Nirankari Bhawan. LIVE updates here

Update at 7:50 PM: HS Phoolka has made a shocking statement saying the Army Chief could have orchestrated the attack.

"Army Chief came and made a statement. To prove his statement, he could have orchestrated the attack. This matter should be looked into. Did govt do it (attack)? Did the earlier govt do it now? It is wrong to repeatedly say that Punjab's atmosphere is not good. We must get to the root of it. Govt must get to the root of it. 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."

Update at 7.40 PM: According to top police sources, they have detained youth aged between 25-30 years old near the locality where blast has taken place for questioning.

Three member team of National Investigation Agency (NIA) to reach the blast site in Amritsar today. The blast that took place earlier in the day claimed three lives (ANI)

Update at 7.05 PM: High alert in Punjab and Amritsar Airport. No cabs or cars allowed at least 50 metres from the airport.

Update at 6:14 PM: Punjab DGP Suresh Arora visits the site

"We are taking this incident as a terror act. At this stage it is difficult to link up but we will find out in  further investigate It will be too early to cone to any conclusion. Overall we know that efforts were being made but in this particular case unless or until we come to conclusive evidence we cannot say anything at  this point of time. Let’s not get into presumptions. As far as this incident is concerned I would say that we will find out the truth and then will come back," he said.

Update at 6:12 PM: Union Cabinet Minister and Shiromani Akali Dal leader Harsimrat Kaur Badal said: First bombs and now grenade attack in #Amritsar, what next Raja saab? When will you and your ministers stop encouraging elements bent on disturbing hard won peace? Stop playing politics and get down to serious governance. Punjabis don’t want to go back into dark era.

 First bombs and now grenade attack in #Amritsar, what next Raja saab? When will you and your ministers stop encouraging elements bent on disturbing hard won peace? Stop playing politics and get down to serious governance. Punjabis don’t want to go back into dark era.

Update at 5:22 PM: Youths aged between 25-30 years old detained for questioning, Punjab police relying on eye-witnesses, as per sources.

Update at 5:01 PM: DGP Punjab Suresh Arora has arrived at the attack site and is inspecting the matter.

Update at 4: 56 PM: Details from the preliminary investigations: 

The chief minister said preliminary investigations had so far revealed that two men, one of them with a flowing beard, with covered faces, allegedly forced their way into the hall by brandishing a pistol. The sewadar has been detained who lobbed the grenade into the prayer room, and fled on a motorcycle.

A crater, which is 3” in diameter was formed by the impact of the explosion, and was being examined by the forensic team. The safety valve of the grenade has also been found and was being examined.

Update at 4:03 PM: Forensic team is examining the spot to find out details of material exploded. Punjab DGP Suresh Arora reaching at the spot to investigate.

Update at 3:40 PM: Visuals from the attack site at the Nirankari Bhawan in Amritsar

Update at 3:28 PM: It was a very sad day for Punjab. All of us are aware about what has happened. We have told the Chief Minister-don't play with fire. We strongly condemn what has happened. Present government is encouraging terror groups. We have constantly warned the government: said former Deputy Chief Minister of Punjab and Akali Dal leader Sukhbir Singh Badal, speaking to Republic TV

Update at 3:10 PM: Home Minister Rajnath Singh condemns the attack, took to Twitter to express grief.

Update at 3:05 PM: It is very painful to see all these happening. Authorities are doing their job and we have full faith in them. Sant Nirankari mission is to spread peace and love. It is a very condemnable act: Vivek Mauji, Sant Nirankari Mission spokesperson

Update at 2:37 PM: Visuals from the hospital where those injured have been shifted after the blast at Nirankari Bhawan in Amritsar district, earlier today

Update at 2: 32 PM: Delhi CM Arvind Kejriwal reacted to the incident.

Update at 2: 27 PM: Punjab CM while speaking to Republic TV, said they will get to the bottom of this. 

Update at 2:18 PM: Punjab CM Amarinder Singh tweeted to condemn the attack:

Update at 2:07 PM: Chief Minister has announced Rs 5 lakh compensation for the kin of the dead and free treatment for the injured after the attack.

Update at 2:01 PM: There might be a terror angle here. We will look into it. This is a very unfortunate incident. We will get to the bottom of this incident. This is a Nirankari Satsang which takes place in every village. They were never the target. This is the first time they have targeted the people of Nirankari satsang. They targeted Nirankari Satsang people because they knew that they don't have any security. There could be a Khalistan or ISI link. I will not be able to visit Amritsar today. DGP and Home Secretary will be there: Captain Amarinder Singh Punjab CM

Update at 2:00 PM: I am saddened. Three people have died and several have been injured. Attackers came and threw grenade. We will get a full report in a short while. In future we will take care that all congregation are protected: Captain Amarinder Singh Punjab CM

Update at 1:49 PM: Initial investigation reveals that it was a grenade attack. Three people have died and 20 injured : SP Singh Parmar, IG (Border)

Update at 1:48 PM: Punjab Chief Minister Amarinder Singh to visit attack site

Update at 1:44 PM: Terrorist attack is increasing day by day. Such incident must be condemned. We received threats from such forces. Punjab is a bordering state. The government will identify the terrorist and action will be taken. Our prayer with bereaved family: Anand Sharma, Congress MP expresses grief.

Update at 1:39 PM: As per sources, among the three deceased in the attack, one is a minor.

Update at 1:37 PM: The attack was carried out at Nirankari Bhawan at a religious sect. Both the centre and state government must ensure to bring all the culprit to law. It is condemnable and a matter of serious concern. I want to say all party must ensure to fight against such forces - Ashwani Kumar, Congress

Update at 1:34 PM: Cops have seized the CCTV footage of the attack site

Update at 1:33 PM: As per latest information from sources, attackers, along with arms in their hands and faces covered, entered the Satsang Bhawan area and opened fire at the gathering. Later, they lobbed a bomb at the site.

Update at 1:31 PM: IG and senior police officials are at the spot. Security has been beefed up at the blast site.

Update at 1:25 PM: The state was under high alert. I don't know how it happened. I cannot comment much right now. People are disturbing the atmosphere of Punjab: Sunil Jakhar, Punjab Congress Chief

Update at 1:15 PM: We are currently looking at the situation. According to prelimenary reports, three people have died and several injured. High alert has been issued throughout Punjab. Preliminary reports suggests that it is a terror attack: Kamaljeet Singh, DC Amritsar

Update at 1:10 PM: As per sources, around 150 people were inside ashram and doing a Satsang when the attack took place during attack. High alert has been issued in several parts of Northern India including Punjab and Delhi-NCR.

Update at 1:04 PM: Speaking to news agency ANI, IG Surinder Pal Singh Parmar confirmed that three people have died and more than 10 people have been injured in the blast that took place in Amritsar's Rajasansi Village

Three people killed and several injured in a blast at the Nirankari Bhawan in Amritsar's Rajasansi Village on Sunday afternoon. The injured have immediately been rushed to a nearby hospital. Meanwhile, the police is at the spot and is taking cognizance of the incident. 

According to reports, two masked bike-borne assailants came outside the Nirankari Dera opened fire and then hurled an explosive at the congregation that was going on at the Nirankari Bhawan since Sunday morning.