A Pakistani student takes a photograph of his friend next to a wall image of late Sufi musician Amjad Sabri in Karachi on June 27, 2016.

One of Pakistan's best known Sufi musicians Amjad Sabri was shot dead by unknown assailants riding a motorcycle in Karachi on June 22, triggering an outpouring of grief over what police described as an "act of terror". / AFP / ASIF HASSAN        (Photo credit should read ASIF HASSAN/AFP/Getty Images)