The explosion is said to have occurred near Tajrish Square, north of Tehran, with suggestions that it was centered on the medical facilities at Sina Athar. Eyewitnesses said the cause of the explosion was unknown. Newsweek reporter Tom O’Connor tweeted: “After reports of an explosion in northern Tehran, Tajrish subway station in Iran.”
Images on social media showed black smoke rising high in the sky over the city, along with flames.
In the middle of the clip, there is a second very loud explosion.
Zillay Shah tweeted: “The cause of the explosion is not yet known.”
Journalist Kian Sharifi posted: “A fire department spokesman confirms to Fars the news that a health center is on fire in northern Tehran, saying ‘people may be trapped inside'”.
The semi-official Iranian news agency ISNA also reported on the blasts, without citing any additional information.
Jalal Maleki, a spokesman for the Tehran Fire Department, told Tasnim news agency that a fire had occurred in a medical clinic in northern Tehran, with firefighters dispatched to the scene.
Tehran Emergency Center chief Peyman Saberian told the Fars news agency that three people were injured.
Local media are informed that it occurred underground and was probably caused by burning gas tanks.
The blast comes days after another blast near a sensitive military site near Tehran last week.
Speaking on state television, a Defense Ministry spokesman said it was caused by a tank leak at a gas storage facility.
However, there was also speculation that it was an accident at a defense site belonging to the Islamic Revolutionary Guard Corps
This is breaking news. Update for updates. More to follow