A 5.8 magnitude earthquake jolted the northeastern Iranian province of Khorasan-e Razavi on Thursday, the Iranian Seismological Center said.
The tremors were registered at 04:29 GMT, with the epicentre located at the depth of eight kilometres (about five miles).
There are no reports about any victims or damages caused by the earthquake.
Iran is located in a seismically active zone and often suffers from powerful earthquakes. The deadliest earthquake in the country's history occurred in 856 AD, killing some 200,000 people.
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