U.S. Secretary of State John Kerry is in Saudi Arabia seeking to ease Gulf Arab concerns about an emerging nuclear deal with Iran as well as instability in Yemen and other nations.

A day after wrapping up the latest round of Iran nuclear negotiations, Kerry was meeting Thursday in the Saudi capital of Riyadh with foreign ministers of the Gulf states and the new Saudi king. U.S. officials said Kerry will reassure them a deal with Tehran won't allow Iran to get the bomb and won't mean American complacency on broader security matters.

Iran is supporting forces fighting in Syria and Iraq and is linked to rebels who toppled the government in Yemen.

Kerry will also discuss the fight against Islamic State group militants in Syria and Iraq.