Pakistan has announced plans to execute around 500 militants in coming weeks, after the government lifted a moratorium on the death penalty in terror cases following a Taliban school massacre.
Six militants have been hanged since Friday amid rising public anger over an attack last Tuesday's which left 149 people dead including 133 children.
The attack in the northwestern city of Peshawar was the deadliest terror attack in Pakistani history, leading to the ending of the six-year moratorium on the death penalty.
A senior government official said the interior ministry has finalised the case of 500 convicts who have exhausted all avenues of appeal.
A second official confirmed the information.
Of the six hanged so far, five were involved in a failed attempt to assassinate then military ruler Pervez Musharraf in 2003, while one was involved in a 2009 attack on army headquarters.
Police, troops and paramilitary rangers have been deployed across the country and airports and prisons put on red alert during the executions and as troops intensify operations against Taliban militants.
President Nawaz Sharif has ordered the attorney general's office to "actively pursue" capital cases currently in the courts, a government spokesman said.
Pakistan described last Tuesday's bloody school rampage, claimed by the Tehreek-e-Taliban Pakistan, as its own "mini 9/11," calling it a game-changer in the fight against extremism.
The decision to reinstate executions was condemned by human rights groups, with the United Nations also calling for Pakistan to reconsider.
Human Rights Watch said the executions were "a craven politicised reaction to the Peshawar killings" and demanded no further hangings be carried out.
Pakistan began its de facto moratorium on civilian executions in 2008, but hanging remains on the statute books and judges continue to pass death sentences.
Before Friday's resumption, only one person had been executed since 2008 - a soldier convicted by a court martial and hanged in November 2012.
Rights campaigners say Pakistan overuses its anti-terror laws and courts to prosecute ordinary crimes.
