RIYADH: Iran's nuclear deal with world powers will mean "a happy day" if it stops the country gaining a nuclear arsenal, but the agreement would prove bad if it allowed Tehran to "wreak havoc in the region", a Saudi official said today.

The official told that Iran had destabilized the whole Middle East through its activities in Iraq, Syria, Lebanon and Yemen and added that if the deal allowed it concessions, the region would become more dangerous.

According to U.S. officials, U.S. President Barack Obama will call Israeli Prime Minister Benjamin Netanyahu, Saudi King Salman and European allies about the Iran nuclear deal.