Pakistan, June 24 -- US Secretary of State Marco Rubio has begun a three-day Middle East tour aimed at reassuring Gulf allies concerned about the recent US-Iran agreement. The visit comes as regional partners seek clarity on key provisions of the accord, including a proposed $300 billion reconstruction fund for Iran. The discussions are expected to shape regional perceptions of the agreement and its security implications.

Rubio arrived in Abu Dhabi on Tuesday and is undertaking his first major diplomatic mission since the deal was reached last week. Speaking to reporters upon arrival, he acknowledged that concerns raised by Gulf partners would feature prominently in his meetings. He also indicated that broader regional issues not covered...