The event in Tehran was described as a “loud explosion, followed by a bright light that was as light as day,” according to MidEast blogger NZIV. According to the blogger Abu Ali Express, Iranian officials have admitted there was an explosion. A senior official in the Iranian emergency services claimed that ambulances have not yet been called. Sources reported a power outage in the city of Shiraz as well, approximately an hour before the explosion near Tehran, leaving 1.2 million households without electricity. Speculation is that was due to an explosion at a Shiraz power plant.