ISLAMABAD, Pakistan (CNN) -- A notorious Pakistani Taliban commander with a reputation for beheading opponents has died in custody, a Pakistani military official said.
The official, who asked not to be identified because he is not authorized to speak to the media, said Sher Muhammad Qasab died Sunday as a result of injuries he suffered during his capture last week.
Qasab was captured after a firefight with security forces that left three of his sons dead, officials say.
He was among the army's 10 most wanted militants in the Swat region in Pakistan's northwest.
The bounty on Qasab's head was worth more than 10 million rupees ($120,000).
The leader of the Pakistani Taliban Maulana Fazlullah is still at large.
The army official said security forces continued their operation in the Swat region on Sunday capturing more than 20 militants including the first cousin of Muslim Khan, the Taliban spokesman already in custody.