According to Iran International, the incident occurred in a motorcycle production factory.
Shortly after, a fire was reported to have broken out in the city of Qom.
On Saturday night, a blast was heard at a power plant in the city of Karaj in Iran, according to footage shared on social media.
According to reports, a 4.0 magnitude earthquake was felt in Karaj, located northwest of Tehran; however, it was unclear whether it was triggered by the explosion or vice versa.