While earlier reports indicated at least 40 dead, the Iranian state owned media later denied the reports saying only 5 people have been injured.
The epicentre of the quake lay 86 km east-south east of Khash, Iran, near the country's border with Pakistan, the US Geological Survey website said.
Iranian state television earlier said at least 40 people were killed, but acknowledged there was no official confirmation.
At least 40 people were killed in Iran after a massive earthquake measuring 7.8 on the Richter Scale hit the Iran-Pakistan border. The tremors were also felt in India, Pakistan and the Gulf.
A 7.8 magnitude earthquake rocked the Iran-Pakistan border on Tuesday, sending shockwaves as far as North India and West Asia.
The epicentre of the earthquake was 86 km east-south east of Khash, Iran, near the country's border with Pakistan, the USGS website said.
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