Police found a pamphlet at the site of Monday's attack near Gujrat city in Punjab province that warned more attacks would be carried out by militants if NATO supply routes to Afghanistan were not closed, The Express Tribune quoted an intelligence agency's report as saying.
Another intelligence agency's report said terrorists linked with the banned Tehrik-e-Taliban Pakistan, who were involved in an attack on security personnel at Pir Chambal, were planning more attacks on government installations. The agency's report on Monday's attack said an "unregistered motorcycle with a time bomb was found and the bomb was defused" after the assault. A grenade lying in bushes exploded after the attack but caused no damage.
The report said police had "found a pamphlet in which it has been threatened that their (militants') activities would continue in future due to restoration of NATO supply".
A group of militants using a car and motorcycles attacked the army camp on the banks of the Chenab river early on Monday morning, killing seven soldiers and a policeman. The security personnel were part of a rescue party that was searching for the body of a pilot who drowned when a military helicopter crashed on May 23.
According to media reports, the Tehrik-e-Taliban Pakistan had claimed responsibility for the attack.