The timing of the attack on the Ali ibn Abi Talib mosque in the eastern Iranian city of Zahedan in the Sistan-Balochistan province bordering Pakistan was by no means casual. Zahedan is a Sunni city. And Shi’ites were mourning the anniversary of Hazrat Zahra, granddaughter of Prophet Mohammad. Over 25 worshippers were killed in last Thursday’s attack on the Shi’ite mosque, and 125 injured.