A “cutting factory” in south Tehran was rocked by an explosion early Tuesday, the Saudi news site Al Arabiayeh reports from Iranian social media. Two people were killed and three injured. The sources suggested it was caused by exploding oxygen tanks at the Sepahan Barish factory in Bagershahr and caused damage to the Saipa Press building. There was no comment from Iranian authorities. This was the sixth major event to plague Iran in recent weeks, some causing serious damage to sensitive sites and facilities. The Kahrizak district governor said the explosion was caused by “negligence in filling oxygen tanks,” Saipa is Iran’s second largest automobile production factory.