|The Tehran high rise building on fire before it collapsed|
The fire was in what is described as Tehran's iconic Plasco building, which was the first high rise built in Tehran, back in the early 1960s. The structure was 17 stories tall.
It's unclear at this point what started the fire, but it appears it began on the ninth floor and spread quickly.
The building's collapse came as scores of firefighters sprayed water on the structure, trying to put out the flames.
In the awful video clip you'll see below, there's a firefighter on a tall aerial ladder spraying water into flaming windows when the building came down. That firefighter survived, but many of his colleagues died.