By Parisa Hafezi, Jana Choukeir and Ahmed Tolba DUBAI/CAIRO, July 29 (Reuters) - The United States and Saudi Arabia jointly struck Iran-backed armed groups in Iraq on Wednesday, the first U.S. airstrikes in the Middle East since President Donald Trump suspended the U.S. bombing campaign against Iran last week. Iran, for its part, said it had fired on U.S. bases in Jordan and at ships in the Strait of Hormuz, prompting Trump to promise retaliatory strikes against Iran, which earlier reported a U.S. projectile hitting its northwestern city of Piranshahr near the Iraqi border.
