"Four people were killed by the earthquake" in Darbandikhan, the town's mayor Nasseh Moulla Hassan told AFP.
An natural disaster of 7.2 magnitude has hit Iraq southeast of the city of As-Sulaymaniyah, according to US Geological Survey.
The epicenter of the quake is 32 kilometers southwest of Halabja near the Iranian border, data from the USGS website showed.
Faramarz Akbari, a local official in the Iranian border city of Ghasr-e Shirin, reported the death toll to Iran's state-run IRNA news agency.
"The quake was felt in several Iranian provinces bordering Iraq".
The U.S. Geological Survey said the quake measured a magnitude of 7.3, while an Iraqi meteorology official put its magnitude at 6.5 according to preliminary information.
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The quake was even felt in the Iranian capital Tehran, with some villages hit by power outages, Iranian state TV reported.
Bam in the country's southeastern province of Kerman witnessed a strong quake in December 2003 which killed 31,000 people.
Iran's semi-official Iranian ILNA news agency says at least 14 Iranian provinces were affected.
Some have spoken of having felt the tremor in Kuwait.
Two people have died in the city of Qasr-e Shirin, Iranian TV reported, citing the country's Emergency Services.