Azam Khan Tariq, the former spokesperson for the Tehrik-i-Taliban Pakistan (TTP), was killed reportedly in air strikes carried out by Afghan and NATO forces in Paktika province, said the spokesman for Sajna Group, which had broken away from the TTP in May 2014.
According to the spokesman, Tariq's son and nine other militants were also killed in the operation.
However the nature of the operation was unclear.
Tariq worked as chief TTP spokesman from 2009 until 2013 and was a close aide to former TTP chief Hakimullah Mehsud, who was killed in a US drone strike in Pakistan in 2013.
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He figured in a list of TTP commanders for whom the Pakistani government offered USD 5 million in 2009.
In May 2014, the outlawed TTP split into two factions after a major group based in South Waziristan quit the TTP and accused its leadership turning the outfit into an organisation providing safety to criminals.