Pakistan Tehreek-e-Insaf office-bearers Ahsan Rashid, Mahmood-ur-Rasheed and Ibrarul Haq have expressed deep grief and sorrow over the death of the son of PTI worker Rana Saleem Niaz. In a condolence message on Tuesday, the PTI leaders prayed for eternal peace to the departed soul and courage to the bereaved family to bear the loss.