Islamabad, Pakistan (CNN) - Pakistani Taliban leader Hakimullah Mehsud is dead, three Taliban sources said Tuesday.
Mehsud died near the city of Multan while on his way to a treatment center in Karachi, the sources said.
It was not immediately clear why he was going to the treatment center.
Authorities have been looking into reports that Mehsud died after being wounded last month in a drone attack.
Word of his death contradicts a statement by a Taliban spokesman last week that Mehsud was alive and in hiding.