TEHRAN, Iran Gunmen attacked an annual Iranian military parade Saturday in the country's oil-rich southwest, killing at least 24 people, including eight members of the country's elite Revolutionary Guard, and wounding 53 others, local media reported. Iran's state-run IRNA news agency cited "knowledgeable sources" without elaborating. It said gunmen were dressed in Guard uniforms and targeted a riser where military and police commanders were sitting.