Video from the initial collapse Monday showed thick dust rise over Abadan, a crucial oil-producing city in Khuzestan province, near Iran's border with Iraq. The Metropol Building included two towers, one already built and the other under construction, though its bottom commercial floors had finished and already had tenants.

Colonel Sayyad Khodai was killed Sunday outside his home by assailants on motorcycles. Iran blamed elements linked to the global arrogance, its term for the United States and Washington's allies including Israel.

Irans powerful Revolutionary Guard was killed outside his home in Tehran on Sunday by unidentified gunmen on a motorbike.