A large fire broke out in a cargo area of Istanbul's main Ataturk Airport on Wednesday injuring three people but not causing any air traffic delays, officials said.According to a report on the website of Reuters, fire engines and ambulances rushed to the scene of the fire where huge plumes of black smoke billowed up from the airport which serves Turkey's largest city. Planes normally used for water bombing forest fires swooped down to douse the flames.The fire broke out around 3:30 pm (1230 GMT) in the cargo section of Terminal C, which is used by smaller airlines, the report said.There was no official word on the cause of the blaze, though the Dogan news agency said it may have been caused by an electricity short circuit, the report said.