The Tarn Taran police has arrested six more suspects in connection with the powerful explosion which took place near Kaler village on Khadur Sahib Link Road on September 4.
The arrested suspects belong to Gurdaspur, Patti and Amritsar and were being interrogated.
The explosion which took place around 7.45 pm in an agriculture field has left the security agencies baffled. Two youth in their twenties were killed and another was seriously injured. The injured,identified as Gurjant, has been admitted to a hospital and is still not in a position to give a statement to the police.
His statement can provide important leads to the blast case that took place in a highly sensitive border district of Tarn Taran.
Besides the state police, the case is also being investigated by the NIA and other agencies. The post-blast investigation team of national security guards also visited the explosion site.
The police had found two pits in the agriculture field where the explosion took place.
Police sources said the youth in their 20s were trying to dig fields when the explosion took place.
Though the police officials are tight-lipped about the findings, Punjab Chief Minister Amarinder Singh said that the accused were trying to make a bomb in a bottle which exploded due to a chemical reaction.
Sources privy to the information said interrogation of 32 people has provided important leads about the motive behind the explosion.
"The accused wanted to cause a blast at a public place. Investigation is on to find out who these people were working for", a senior police official not wanting to be named said.
Sources also said the police suspect the hand of ISI and Khalistani terror groups in the explosion. Traces of foreign funding have also been found.
It is worth mentioning that Tarn Taran district was a hotbed for terror activities during the Khalistan militancy days.
Police was also trying to find out whether this blast has any link with November 18, 2018 Amritsar grenade attack in which three followers of Nirankari sect were killed and 19 others were injured. The terror attack was one of the desperate bids to revive terrorism in Punjab.