Middle East live: Pentagon watchdog says Iran war has led to munitions shortfall

A series of attacks carried out by Yemen's Houthis using ballistic missiles and drones wounded 13 civilians in southern Saudi Arabia on Tuesday. Meanwhile the US Defence Department's inspector general revealed that the United States is facing a shortfall in ammunition as a result of its costly war in Iran. Follow our liveblog for the latest updates.

Yesterday's key developments:

• US President Donald Trump said he is willing to negotiate with Iran, after weeks of saying it was too early to make a deal with Tehran to end the Middle East war.

• Saudi Arabia launched dozens of airstrikes on western Yemen after Iran-backed Houthi rebels attacked military facilities in the kingdom.

• Saudi ​Arabia ​requested the postponement of ​a ‌meeting ⁠between ‌Tehran and Gulf ⁠powers on the Strait of Hormuz that was ​supposed to ‌take place ‌in ​Oman on Monday.