An explosion at a paint factory in northwestern Turkey killed five people and wounded 14 others on Wednesday, officials said, and state media said the blast was triggered by a boiler. The force of the explosion caused the roof of the factory to collapse and left extensive damage to some nearby vehicles, footage from the scene, in the Gursu district of the northwestern Bursa province, showed. The state-run Anadolu news agency said a boiler caused the explosion, and officials were investigating what happened. "There are five dead and 14 wounded so far. We are following every moment of it and have started our investigations. There are no risk at the moment, but it was a very big explosion that damaged the area," Deputy Prime Minister Hakan Cavusoglu said. The mayor of Gursu, Mustafa Isik, was quoted by broadcaster NTV as saying nine workers were in the factory during the blast and that customers may also have been in the building. Ambulances, fire trucks and search and resuce teams from Turkey's Disaster and Emergency Management Presidency (AFAD) were sent to the area. An official from the local AFAD office said the priority was to help the wounded and those stuck in debris, and added that a comprehensive evaluation and investigation into the cause of the explosion would follow.