An earthquake measuring 5.9 on the Richter scale struck Iran's southern province of Bushehr on Sunday, state television reported.
The epicentre of the quake was the town of Rig and hospitals in nearby cities and provinces were on alert, with rescue teams and 50 ambulances sent to the area, a regional official told state TV.
Electricity and landline telephone and internet in the regional city of Gonaveh had been cut off "and people are taking to the streets for fear of earthquakes," news agency Tasnim reported.
An Iranian government official told Reuters there were no reports of damage at the Bushehr nuclear complex, situated on Iran's Gulf coast.
The quake was centred 100 km away from the plant and was relatively shallow - only 10 km deep according to Iranian media - which would have amplified the shaking.
Media reported nine aftershocks and posted pictures that showed collapsed mud brick walls in some villages.
Two people were injured in Gonaveh and were being taken to hospital, state media quoted the head of the Bushehr University of Medical Sciences, Saeed Kashmiri, as saying.
The US has granted India a six-month sanctions waiver to operate the Iranian port of Chabahar, India said on Thursday, boosting its efforts to enhance trade with Afghanistan and Central Asian countries bypassing Pakistan.
US President Donald Trump said on Thursday he had agreed to reduce tariffs on China to 47 per cent in exchange for Beijing resuming US soybean purchases, keeping rare earths exports flowing and cracking down on the illicit trade of fentanyl.
Israeli planes and tanks pounded areas in eastern Gaza on Thursday, Palestinian residents and witnesses said, a day after Israel said it remained committed to a US-backed ceasefire despite launching more lethal bombardments in the territory.
Police have arrested five more suspects linked to the theft of treasures worth $102 million from the Louvre museum's Apollo gallery, the Paris prosecutor said on Thursday, expressing hope the latest developments will help them find the jewels.
Afghanistan and Pakistan will restart peace talks in Istanbul, three sources familiar with the matter said on Thursday, a day after Islamabad said the discussions had ended in failure.