Arab states in the Persian Gulf called off a meeting with Iran planned for Monday, while Yemen's Houthis launched a new attack on Saudi Arabia after fighting that has extended the Middle East war to another theatre and further jeopardized global oil supplies.

Gulf crisis widens with US-Iran standoff, Saudi pipeline closure, Houthi advances in Yemen, Bab Al Mandeb risks and Somali piracy resurgence.

By Mohammed Ghobari and Nayera AbdallahADEN/DUBAI, Sept 13 (Reuters) - New strikes on Saudi Arabia and on ships in the Gulf tested nerves in the Middle East on Sunday, after an…