The earthquake struck near the south-western town of Kaki, around 60 miles south of Bushehr where the country's only nuclear power station is situated.
Some 10,000 people live in the affected area spread across more than 50 villages, BBC News reports. Photographs appeared to show buildings completely flattened by the tremours.
The BBC also cites the local governor as saying that 700 houses have been damaged and 200 families affected.
More top news
Tory Chief Whip Michael Gove has taken time out from his schedule to claim second place in Westminster's Dog of the Year competition.
An airline safety video features orcs in oxygen masks, elves for flight attendants and epic battlefield scenes.
TV presenters Richard Madeley and Judy Finnigan say they have made a formal complaint after their daughter received rape threats.