The storm struck Tehran with winds of up to 110 kilometers per hour, state television reported. Its report said the storm killed five people, while Iran's official IRNA news agency said it killed four people as winds hit 130 kilometers per hour (80 mph).
The TV report said the storm broke trees and plunged the capital into darkness for several minutes. It said the storm caused a chain-reaction crash on a highway south of the capital with 20 vehicles and caused international flights to be cancelled. Air traffic controllers diverted several domestic flights to central Iran.