The Pakistani Taliban has admitted shooting Malala in the head on a school bus a month ago to punish her for the "crime" of campaigning for girls' rights to go to school in the militants' stronghold of Swat.

"Afghanistan will hunt for Malala's attackers," Karzai said in an interview with India's CNN-IBN television network, aired as he began a four-day visit to the South Asian nation and as the world marked "Malala Day".

"Terrorism is a snake and when you train a snake, you can't expect it will only go in the neighbour's house," he said. "When the attack on Malala happened, this proved our point," he said, wrongfully putting the blame on Pakistan’s shoulders.

"The earlier they (the Pakistanis) accept it and fight radicalism, the better for us, the better for Pakistan and the better for India," Karzai said.