Iranian state TV says a powerful earthquake in a sparsely populated area in the south of the country has killed 30 people and injured 650.
TV said Tuesday's magnitude 6.1 earthquake centered on the town of Kaki did not damage the nuclear plant at Bushehr, a city on the Persian Gulf some 96 kilometers (60 miles) away.
The quake was felt across the Gulf in Bahrain, the United Arab Emirates and Qatar.
Iran sits on several seismic faults and suffers frequent earthquakes.
The report said the earthquake struck the town of Kaki some 96 kilometers (60 miles) southeast of Bushehr, a town on the Persian Gulf that is home of Iran's first nuclear power plant. The Iranian media originally reported that the quake hit nearby Khormooj.
Shahpour Rostami, the deputy governor of Bushehr province told state TV that rescue teams have been deployed to Shomneh, the most damaged district in the region.
Kaki resident Mondani Hosseini said that people had run out into the streets out of fear.
Two helicopters were sent to survey the damaged area before sunset, Mohammad Mozaffar, the head of the province's rescue department said.
The quake was felt across the Gulf in Bahrain, the United Arab Emirates and Qatar, where workers were evacuated from high-rise buildings as a precaution.
Earlier on Sunday a lighter earthquake jolted the nearby area. Iran is located on seismic faults and it experiences daily light earthquakes.
In 2003, some 26,000 people were killed by a 6.6 magnitude quake that flattened the historic southeastern city of Bam.