Authorities say three suicide bombers targeted the headquarters of a Pakistani paramilitary force on Monday, killing three personnel and wounding at least five.

The Police said the attackers opened fire as they forced themselves into the headquarters of the Frontier Constabulary in Peshawar city before blowing themselves up inside the complex.

Three paramilitary personnel were killed, said Javed Iqbal, the deputy commandant of the force.

The headquarters of the force is located in a densely populated area of Peshawar, the capital of Khyber Pakhtunkhwa province.

No militant group has claimed responsibility for the attack so far.

Islamist militants operating in the region have ramped up attacks in recent weeks after last month’s deadly border clashes between Pakistan and Afghanistan.

Pakistan blames the Afghan Taliban for harbouring the militants who it says launch cross-border attacks, a charge Kabul denies.