An earthquake of 6.2 magnitude hit southern Iran early Saturday, the US Geological Survey said, following a quake in the Gulf nation of Oman near the northern city of Al Khasab with a 6.3 magnitude.

The epicenter of the Iran quake was measured at 85 kilometers southeast of the southern town of Minab at 0208 GMT, with a depth of 36.44 km, according to the USGS.

The head of Iran’s Red Crescent rescue corps Mahmoud Mozafar told the Fars news agency that at least 11 people had been injured in five villages which were “severely” hit by the quake, Al Arabiya reported.

This is the fifth earthquake to hit Iran in the past month. On Friday, Iranian environmental protection chief Mohammad-Javad Mohammadizadeh told Reuters that Iran’s nuclear and hydropower facilities were protected from cyber attacks and earthquakes.

“Most of the energy producing utilities – including all our power plants, being hydropower or even nuclear – they do comply with the minimum of 8, up to about 10, on the Richter scale for resistance to earthquakes,” said Mohammadizadeh just days after a moderate earthquake rattled a region near the country’s main nuclear reactor.

The official Islamic Republic News Agency said Monday’s quake had a preliminary magnitude of 5.1 and was centered near Kaki, about 100 kilometers (60 miles) southeast of Bushehr on the Persian Gulf coast.

Last month, a major earthquake of 7.8 magnitude, described as the strongest to hit Iran in more than half a century, flattened homes and offices on both sides of the Iran-Pakistan border, killing at least 53 people in the sparsely populated region and swaying skyscrapers and buildings as far away as New Delhi.

Earlier in April, a 6.1 temblor in the south killed at least 37 people and raised calls for greater international safety inspectors at the nuclear reactor in Bushehr.

Iran said there was no damage to the reactor in that quake.

Iran lies on seismic fault lines and experiences one slight quake a day on average.

In 2003, some 26,000 people were killed by a magnitude-6.6 quake that flattened the historic southeastern Iranian city of Bam.

AP contributed to this report.