TEHRAN, IRAN - JUNE 7: Police officers stand outside Iran's parliament building following an attack by several gunmen on June 7, 2017 in Tehran, Iran. At least 12 people were killed and dozens more wounded during simultaneous gun and suicide bomb attacks in Iran's capital.  A suicide bomber targeted the shrine of Ayatollah Ruhollah Khomeini while several gunmen launched an attack on the parliament building, which is now reportedly over following hours of audible gun-fire. (Photo by Majid Saeedi/Getty Images)