An explosion reportedly damaged a factory south of Tehran in the early hours of Tuesday, the latest in a series of blasts in Iran.

According to Iranian media reports, two people were killed and three were injured in the blast at the Sepahan Bresh factory in the Kahrizak district.

Kahrizak district governor confirmed the explosion in Baqershahr, south of Tehran, telling the Islamic Republic Radio and Television News Agency that the blast was caused due to human error as oxygen tanks were being filled at the factory.

The governor said the explosion also damaged the walls of an adjacent Saipa Press — a car parts company — complex.

Firefighters and paramedics were dispatched to the scene.

The explosion came after a series of mysterious disasters have struck sensitive Iranian sites in recent days, leading to speculation that the earlier incidents may be the result of a sabotage campaign.

An explosion reportedly damaged a power plant in the Iranian city of Ahvaz on Saturday. A few hours later, the Islamic Republic News Agency said a chlorine gas leak at a petrochemical center in southeast Iran sickened 70 workers.

Last week an explosion damaged Iran’s Natanz nuclear facility, and a week before that, a large blast was felt in Tehran, apparently caused by an explosion at the Parchin military complex, which defense analysts believe holds an underground tunnel system and missile production facilities.

A Middle Eastern intelligence official was quoted Sunday by The New York Times as saying the fire that damaged a building used for producing centrifuges at Natanz was sparked by Israel and was caused by a powerful bomb.

But the unidentified official said Israel was not linked to several other recent mysterious fires in Iran over the past week.

An Israeli TV report Friday night said that Israel was bracing for a possible retaliation from Iran if it determines that Jerusalem was behind the explosion.

Read more at Times of Israel