Across the border in Iraq, officials said nine people were killed.
It reported that the death toll of 530, made it Iran's deadliest quake in over a decade, while thousands of people were injured and 30,000 homes damaged, adding that two whole villages were destroyed.
The quake hit Azgeleh, but officials said the highest number of casualties were in Iran's Kermanshah province.
Full-scale rescue operation could start only with the dawn, and yet unknown, are still people under the rubble. Filed with the United Nations within a radius of 15 km from the epicenter of the quake live about 19 thousand people. "The most urgent need is to provide solutions for heating, housing and food", Pir Hossein Koolivand, the head of national rescue services, told state television.
Kermanshah's provincial officials said about 12,000 houses both in urban and rural regions across the province have been totally damaged due to the strong quake.
"Today, we sent our ambulances to villages in areas affected by the quake to help people rescued yesterday, including changing their bandages", he said.
As of Monday, over 100 medics have been sent to devastated areas of Iran.
The Iranian army, the elite Revolutionary Guards and forces of its affiliated Basij militia were dispatched to affected areas on Sunday.
By Monday, officials said all the roads in Kermanshah province had been reopened.
The quake was centred near the border of Iraq and Iran, and was felt for hundreds of kilometres.
In 1990, a 7.4-magnitude quake in northern Iran killed 40,000 people, injured 300,000 and left half a million homeless, reducing dozens of towns and almost 2,000 villages to rubble. This was the deadliest quake to hit Iran in over a decade.
The disaster killed no fewer than 530 people, official report said.