New Delhi, Dec 17 (ANI): Condemning Peshawar's terror attack and expressing shock over the killing of innocent school children, National Security Advisor (NSA) Ajit Doval on Wednesday said he has never seen or heard in his life that people could be so inhuman. Doval even visited the Pakistan High Commission in the national capital and wrote a condolence message over the Peshawar attack. He also extended his condolences to Pakistan High Commissioner Abdul Basit. The Tehreek-e-Taliban has claimed responsibility for the attack. The Taliban spokesman said that it was a revenge for the military's operation against militants in the North Waziristan tribal area.