An earthquake with a magnitude of 5.2 has hit Razavi Khorasan Province in northeastern Iran.
The quake occurred at 8:23 a.m. local time (0402 GMT) on Monday at a depth of six kilometers (3.7 miles), with its epicenter located about 44 kilometers northeast of Quchan city.
The tremor also shook Mashhad, Iran's second largest city, but there were no immediate reports of casualties or damage.
Quchan Governor Aminreza Merati said based on the preliminary reports, the quake had caused no damage or casualties.
He told IRNA news agency that the Crisis Management Headquarters of Quchan County was on high alert and that all arrangements had been made to provide relief to possible victims.
The quake caused residents of Quchan to rush out of their homes in panic.
Brigadier General Reza Azarian, the commander of the Iranian Army’s ground forces in northeast Iran, put his units in Quchan and neighboring Bojnurd on alert for rescue and relief operations.
Azarian stressed that Army units and personnel are well trained and prepared to respond to natural disasters, thanks to regular exercises.
Iran experiences frequent seismic activity as it sits where two major tectonic plates meet.
The earthquakes have sometimes turned disastrous over the past years. In 2003, more than 26,000 people lost their lives following a major quake that ruined the ancient city of Bam in eastern Iran. In 1990, a 7.4-magnitude quake in northern Iran killed thousands of people.
At least two other significant quakes stuck in 2005 and 2012, which killed a total of about 1,000 people.