The teenager survived despite being shot in the head by a Taliban fighter and was taken to Britain for treatment.
Fazlullah came to prominence as a leader of the Tehrik-e-Nifaz-e-Shariah-e-Mohammadi and later became the head of the Taliban in Swat Valley, located 160 km from Islamabad.
He led a brutal rule in the region during 2007-09 and was accused of personally ordering the killing of scores of people, including women.