Tehrik-i-Taliban Pakistan (TTP) claimed responsibility for the attack, describing it as revenge for the military operations conducted by Pakistan.
He said the mastermind of the attack from Jalalabad – was in touch with handlers from the Indian consulate. He further asserted that more than a million U.S. dollars of the Indian embassy funds got utilized for the merger of the Tehreek-e-Taliban Pakistan (TTP) with four other militant groups. However, there were no pieces of evidence provided.
Hindustan Times reported that External affairs ministry spokesperson Anurag Srivastava dismissed and condemned Yusuf’s claims during a weekly news briefing on Dec. 15. He said that Yusuf's statements were ‘contrary to facts on the ground, misleading and fictitious.’
On Dec. 14, 2016, six terrorists of the terror group Tehreek-e-Taliban on Warsak Road in Peshawar stormed Army school premises in Peshawar and shot dead around 141 people, of which 132 were students. The terrorists went classroom to classroom preying on children. Around 100 people were left injured during the attack. The militants with guns were wearing the uniforms of security forces, some strapped with suicide vests. The attack was estimated to have lasted about eight hours.
As reported in the Hindu and also in Pak-based news organizations including the Tribune, Tehreek-i-Taliban Pakistan (TTP) claimed responsibility for the attack, who ascertained that the attack was in retaliation to the military operations in North Waziristan Agency - Operation Zarb-e-Azb and Khyber Agency of FATA.
As the attack was underway, a phone call made to a media organization, TTP spokesman Muhammad Khorasani alias Umer Narae said, “Our six fighters successfully entered the army school, including target killers and suicide attackers. They have been ordered to shoot the older students, but not the children. We are giving them direct instructions not to harm minors. We want them [the army] to feel our pain because they target our families, and we are giving them instructions from outside.”
Since there are no proofs of the claims made by Pakistan PM Imran Khan’s aide, therefore the claim is baseless and false.