By Timour Azhari, Parisa Hafezi and Ahmed TolbaDUBAI/CAIRO, July 29 (Reuters) - The U.S. and Saudi Arabia launched strikes on Iran-backed groups in Iraq on Wednesday, saying they were responsible for drone attacks on Saudi oil facilities, prompting Iran to warn that blaming it for such attacks was a "major miscalculation".The strikes on targets inside Iraq come as Oman proposed a new regional deal aimed at resolving the conflict over the critical Strait of Hormuz, through which about a fifth of global oil and liquefied natural gas flowed before the war.

Attacks come as Saudi Arabia intercepts drones and Iran warns of 'any action' to maintain its control of Hormuz.

Attacks come as Saudi Arabia intercepts drones and Iran warns of 'any action' to maintain its control of Hormuz Strait.