Washington, May 14 (IANS) The US State Department Friday condemned the terror attack in northwest Pakistan that killed over 80 people, Xinhua reported.

State Department spokesman Mark Toner said described the suicide bombing as a "heinous attack."

"It only highlights the existential threat that these kinds of extremist organisations pose to Pakistan, and underscores why it' s so important that we continue to work together both on defeating and dismantling Al Qaeda as well as its affiliates," he added.

Two suicide bombers blew themselves up at a training centre for Pakistani security personnel Friday.

The Taliban, which claimed responsibility for the attack, said it was in "revenge" for the killing of Al Qaeda chief Osama bin Laden.

The bombers struck at the Frontier Constabulary in Shabqadar area of Charsadda town, 35 km from Peshawar, in Khyber Pakhtunkhwa province, killing the new recruits who had completed one year of training and were about to go home on 10-day leave before assuming nationwide duties.