Rescue teams have worked overnight to try to reach trapped firefighters and other victims after a commercial building in central Tehran collapsed and killed at least 30 firefighters.
Scores of workers and dozens of trucks were searching the ruins for victims on Friday, a day after a historic high-rise building in the heart of Iran's capital caught fire and later collapsed.
Saeed Sharifizadegan, head of Tehran's fire department, says: "The smoke is a sign of continuation of the fire under the rubble."
Meanwhile, reports said Behnam Mirzakhani, one of the hospitalised firemen, had died from severe injuries.
