At lesat 30 firefighters in Tehran have been killed after responding to a huge fire broke out in a commercial high rise building which caused the structure to collapse.
Iranian state media said that it is believed people are still trapped beneath the rubble.
Emergency services, including ten fire engines, are still at the 17-storey tall Plasco building, where the blaze is still burning after breaking out at around 8am (4.30am GMT) on Thursday morning.
Dramatic footage showed the iconic structure collapsing in on itself, taking out three fire trucks as it fell.
At least 38 firefighters were taken to hospital, state media reported earlier.
The fire is now under control, fire department spokesperson Jalal Maleki said.
The 50-year-old Plasco, home to a major shopping centre, is one of Tehran's most recognisable landmarks.
The tower was built in the early 1960s by Jewish businessman Habib Elghanian, named after his plastics manufacturing company.
At the time of its construction the Plasco was the tallest building on the city's skyline.
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