An explosion has killed at least 17 people and injured more than 40 at a textile firm's premises in a suburb of Istanbul, Turkish officials say.The blast caused part of a five-storey building in the western Davutpasha district to collapse.
Injured people were carried out of the building, but some victims are said to be still under the rubble.
The city's governor, Muammer Guler, says it is not yet clear what caused the blast. But he ruled out terrorism.
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