A report released by the provincial seismographic network, affiliated to Tehran University Geophysics Institute, said that the quakes occurred between the cities of Darab and Jahrom.
The epicenter of the quakes are recorded at 215 kms to the southeast of the provincial capital city of Shiraz.
Another report released by the governor's office of Zarrin-Dasht said that several residences collapsed in Dabiran and Shah-Alamdar villages when the earthquake hit the area.
It added that following the quakes which shook southern Fars province on July 9, 11 more earthquakes and about 200 aftershocks have struck the area.
The two quakes measuring 5.6 and 5.8 on the open-ended Richter scale, which hit Zarrin-Dasht and Jahrom respectively on July 9, claimed two lives and injured 147.
Some 4,000 residences as well as 22 schools and government offices in an urban area and 23 villages suffered material loss ranging between 20-100 percent.
The district governor of Kouhbenan, Ahmad Khaledi, told IRNA that the quake occurred at 03:26 hours local time (22:56 GMT).
An earthquake, measuring 2.6 degrees on the open-ended Richter scale had earlier jolted Kouhbenan Saturday night. The quake occurred at 23:19 hours local time (18:49 GMT).
There were no reports of any casualty or damage from both quakes.
Iran is situated on some of the world's most active seismic faultlines and quakes of varying magnitudes are usual occurrences.
Since 1991, over 950 earthquakes have hit the country resulting in 17,600 deaths and 53,300 injuries.
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