A huge fire that tore through an oil refinery in the Iranian capital had been brought under control on Thursday, but was still not completely extinguished. The official IRNA news agency said: “The fire at the refinery has been brought under control and will be completely extinguished by noon,”. A column of black smoke was still visible over the site of the inferno around midday, AFP journalists reported, although it was not as thick as the day before. Teams of firefighters were seen battling the blaze in footage from the scene broadcast by state television. An investigation is underway.