Washington carried out a third consecutive night of strikes on Iran as President Donald Trump vowed more military action, while renewed Houthi missile attacks on Saudi Arabia signaled a widening regional conflict.

Trump vows to guard the Strait of Hormuz and charge shipping fees, as Iran rejects any US role and allies condemn Tehran's attacks

Iran and the United States traded attacks across the Gulf as Tehran said it had again closed the Strait of Hormuz, raising concerns over energy supplies and regional security.

Speaking ahead of the NATO summit in Ankara, the U.S. president said he no longer wanted to engage with Tehran, dismissing further negotiations as a waste of time.

The NATO chief defended Washington's latest military action against Tehran while urging Europe and Canada to increase defense spending as alliance leaders met in Ankara.

Crude prices dropped for a third day as Washington and Tehran reported progress on Strait of Hormuz talks

Foreign Ministry spokesman Esmaeil Baghaei said Iran is determined to retain control over the strait, while a new round of talks with Qatar on the US deal is expected Wednesday

The agreement between Washington and Tehran includes provisions for nuclear monitoring, though Iran has said some sites will remain restricted until a final deal is reached