Iranians mourn during the funeral of the victims of the attacks on Tehran's parliament complex and the shrine of revolutionary leader Ayatollah Ruhollah Khomeini, in the capital Tehran on June 9, 2017.
Tehran hit out at Washington and Riyadh as tens of thousands attended the funerals Friday for those slain in the first attacks in Iran claimed by the Islamic State group. / AFP PHOTO / ATTA KENARE        (Photo credit should read ATTA KENARE/AFP/Getty Images)