The provincial judiciary said at least 10 people were arrested, including the mayor and two former mayors, accused of being "responsible" for the collapse, state TV reported online. An investigation has been opened into the cause of the disaster in Abadan, a city of 230,000 people, 660 kilometers southwest of Tehran. In a previous disaster in Iran, 22 people, including 16 firefighters, died in a blaze that engulfed the capital's 15-story Plasco shopping center in January 2017.