Tehreek-e-taliban's leader Sheharyar Mehsud Photograph:( Twitter )
This is the third high profile assassination of Afghanistan based terrorists who are wanted in Pakistan for multiple offences.
Mehsud died after a remote control bomb went off in Kunar province. According to sources, he was taking a walk in Marwara area of the province.
Last week, a key leader of Afghanistan Taliban called Sheikh Khalid Haqqani was killed in clashes with security forces in Afghanistan.
Taliban's top ranking commander Haqqani was killed in January.
He had joined the terror group after the red mosque operation in 2007 when Pakistan's military had stormed the compound to dislodge armed terrorists holed up inside for about a week.
Earlier, Qari Hossein was also assassinated under mysterious circumstances in Kabul.