Three days after an RPG attack at a police station in Tarn Taran, the Punjab Police on Monday said it has detained four suspects who provided logistical support in carrying it out.

Two suspects who carried out the attack were yet to be detained, it said.

The rocket-propelled grenade was fired at the Sarhali police station in Tarn Taran on Friday night, the second such attack in the state in the last seven months.

Briefing the media here, Inspector General of Police (Headquarters) Sukhchain Singh Gill said four suspects who provided logistic support, motor cycles, etc. in the RPG attack have been detained.

"Two persons who executed this act, their identification process is going on,” he said.

"I cannot disclose any name at this stage. Identification, detaining of suspects and the process of further identification were going on," he added.

Gill said in one or two days, police will disclose more facts including names, who were behind it and how it was done.

He said the investigation was being conducted under the supervision of additional director general of police (internal security) R N Dhoke while ADGP (counter intelligence) Amit Prasad was camping in Amritsar.

Prima facie, police have got all the clues of this incident, he said, adding that the crime has been unearthed.

Further investigation was underway, he said.

Some unidentified people had fired the projectile which hit the Saanjh Kendra adjoining the Sarhali police station on the Amritsar-Bathinda highway on Friday night.

The projectile first struck the iron grills of the gate of the police station and then hit the wall of the Saanjh Kendra.

Director General of Police Gaurav Yadav, who had visited the site, had said that it was military-grade hardware which was suspected to have been smuggled from across the border.

"There is a clear indication that it is a strategy of the neighbouring nation to bleed India by a thousand cuts," the DGP had said.

An FIR under the Unlawful Activities (Prevention) Act has been registered in connection with the incident.

Earlier in May, a rocket-propelled grenade (RPG) was fired at the Punjab Police's intelligence headquarters located in Mohali.

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