Iran High-Rise collapse Kills 20 Firemen
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Image copyrightEPAImage captionFirefighters battled the blaze for hours before the block collapsed
Image captionLittle was left of the 17-storey Plasco building after it crumbled to the ground
Image captionThe building was the first high-rise block in central Tehran
Image captionIt was not immediately clear how many people were trapped
Image captionRescue workers managed to pull some wounded firefighters out of the rubble
Image captionOthers who survived unscathed had to be consoled by colleagues
Image captionPresident Hassan Rouhani has ordered the interior minister to investigate the incident