Saudi men hold placards bearing the portraits of victims of a mosque bombing carried out by the Islamic State (IS) group during a mass funeral in the mainly Shiite Saudi Gulf coastal town of Qatif, 400 kms east of Riyadh, on May 25, 2015. The suicide bombing was the second mass killing of Shiites in the kingdom since late last year. In November, gunmen killed seven Shiites in the Eastern Province town of Al-Dalwa. AFP PHOTO / HUSSEIN RADWAN