KOHAT, July 29: The bomber who got blown up in one of the two explosions which also killed two security officials appeared to be a Pakistani, an official who examined the remains of the suspected militant told Dawn.

The official said that the 5.6 feet tall, well-built stout young man appeared to be a native, most likely a tribesman. "There are some (in the security agencies) who believe that the bomber could be a foreigner. But what I could make out from his remains was that he was a native, most likely from the tribal area," the official said.

He said that the upper torso of the bomber was blown to pieces and his upper portion of the body was torn to pieces that indicated that he was blown up while leaning over the explosive device while trying to plant it.

The official, however, hastened to add that they were still trying to establish the identity of the man who had left little behind to provide any clue to the investigators.

Security officials have collected a comb, a looking glass and a rosary from the scene of the explosion. The official said that the second device that killed two officials of the Intelligence Bureau, an assistant director and an inspector, was an anti-personnel mine that was attached to a timer.

He said that the device - a Claymour anti-personnel mine - was designed to throw pallets in one direction and appeared to have been planted to create scare. However, the two security officials, he said, were dangerously close to the device despite warnings by his superiors with whom they were in touch from the scene of the tragic event.

The bomber had been able to enter an area that is being guarded by security officials from all four sides. The area has the house of General Officer Commanding (GOC) of the IXth division of the Pakistan Army.

The bomber was killed in the first explosion while the second device placed in a shopping bag went off at around 8.40pm, the official said. The Kohat region Deputy Inspector-General of Police, Abdul Majeed Marwat, told Dawn on Thursday that no arrests had been made so far but investigations were under way to identify the individuals or organizations which were behind the attacks on military installations in Kohat for the last one year.

"It is extremely difficult to identify the groups behind these explosion. They could be belonging to Wana, Al Qaeda or Taliban remnants or some local religious fanatics," he said.

Different military and police teams were still visiting the sites of the blasts. The Cantonment police station staff said that no FIR had been registered yet as the officers were still engaged in preliminary investigations and gathering evidence from the scene of the crime.

Meanwhile, the authorities have decided to strictly confine Afghan refugees to their respective camps, Mr Marwat said. Similarly, troops have been deployed at the hilltops in Hangu and Kohat to check the movement of people from the adjoining tribal area into Kohat.

Mr Marwat said that patrolling had also been increased in the sensitive areas, especially on the Kohat-Darra Adam Khel border, Indus Highway and around the air base which had been attacked four times during last six months.

This would be in addition to the two police check posts which were established on the Shahpur mountains from where the terrorists had first attacked the air base on Jan 28.

The body of IB Assistant Director Baitullah Masud was taken to his ancestral graveyard in Wana, South Waziristan Agency, for burial. Inspector Khobaz Khan was laid to rest in Bannu on Thursday.