Peshawar, Dec 16 (ANI): At least 84 children have been killed in a Taliban attack on a school in the Pakistani city of Peshawar on Tuesday (December 16), an official said. Troops surrounded the building and an operation was under way to rescue the remaining children, the army said. A journalist at the scene said he could hear heavy gunfire from inside the school. Pervaiz Khattak, Chief Minister of Khyber Pakhtunkhwa, the province of which Peshawar is the capital, said 84 children had been killed. In an atmosphere of uncertainty, students who had been rescued were frisked by soldiers before being allowed to move away from the site of the attack. One rescued student described the scene. Pak Prime Minister Nawaz Sharif, who reached the spot, condemned the attack.