An explosion on an oxygen pipeline in a petrochemical plant in Assaluyeh on Irans Gulf coast killed one worker, Iranian state media reported on Wednesday, adding that the ensuing fire had been extinguished. "One worker was killed and two others were injured in the explosion on the oxygen transmission pipeline," Irans state news agency IRNA quoted Abdolnabi Yusefi, governor of Assaluyeh in Irans Bushehr province, as saying. "The reason for the blast is under investigation and the fire has been extinguished."