"There have been many earthquakes between magnitude 5 and 6, but only a few over magnitude 7", Polet told USA TODAY.
Another two people were killed in Kalar, according to the director of the hospital in the town about 70 kilometres (45 miles) south of Darbandikhan.
Iraq's Meteorological Organization issued a warning on state TV urging people to stay away from buildings and to avoid from using elevators, CNN reported.
In Iran, the ISNA news agency said that the quake was felt in several cities in the west of the country including Tabriz.
The quake's epicenter was located 32 kilometers north of the Iranian city of Sarpol-e Zahab and 100 kilometers southeast of Iraq's Sulaumaniyah at a depth of ten kilometers.
Pirhossein Koulivand, head of Iran's emergency medical services, told a local television station that the natural disaster led to a power outage in the country's western cities of Mehran and Ilam.
A TASS correspondent reported from Kuwait City that earth tremors had been felt in that city.
Shocks were felt in several Iranian cities, with eight villages damaged and electricity cut in others, local media said. In the town of Diyarbakir, residents also left their homes before returning.