Smoke plumes caused by refinery strikes drifted across Tehran on Monday, satellite images show, as the World Health Organization (WHO) warned that attacks on oil facilities could pose serious health risks to residents.
Since the US-Israeli attacks on Iran began on 28 February, we have confirmed strikes on at least four oil facilities around the capital.
Residents said smog and pollution have blocked out the Sun and left a strong smell of burning in parts of the city, while experts warn the scale of some of the pollutants released could be "unprecedented".
The US and Israel have yet to comment on the attacks.
The spike in air pollution appears to focus near the damaged oil sites around the capital - a city with a population of nearly 10 million, with millions more in the surrounding areas.
