TEHRAN: Iran on Tuesday condemned three suicide bombings that rocked Saudi Arabia, one of them targeting Masjid-i-Nabawi, Islam’s second holiest place, in Madina. “There are no more red lines left for terrorists to cross. Sunnis and Shias will both remain victims unless we stand united as one,” Iranian Foreign Minister Mohammad Javad Zarif said on Twitter.Four security guards were killed in the Madina bombing. The other attacks on Monday targeted the US consulate in Jeddah and a Shia mosque in Qatif. “Terrorism knows no border or nationality and there is no solution except creating an international and regional unity against this phenomenon,” Foreign Ministry spokesman Bahram Ghasemi told state broadcaster IRIB. There were no immediate claims of responsibility for the attacks. Iran and Saudi Arabia are locked in an increasingly tense competition for regional influence, and back opposing sides in regional conflicts, including in Syria and Yemen.