Iran on Sunday wrapped up rescue operation in hundreds of villages flattened by twin earthquakes the day before in its northwest, as officials gave a new toll of 227 dead and 1,380 injured in the disaster.

"Search and rescue operations have ended and we are now working to ensure survivors' needs in terms of shelter and food," Interior Minister Moustafa Mohammad-Najjar told state television.

He conveyed the new toll, lower and more precise than one given earlier by his ministry, as local officials verified information gathered in the hectic first hours after the two quakes hit on Saturday.

The first of the earthquakes registered a strong 6.4 on the moment magnitude scale, according to the US Geological Survey, which monitors seismic activity worldwide.

The second, almost as strong at 6.3 on the scale, rumbled through just 11 minutes later.

While the biggest city in the region, Tabriz, and nearby towns escaped with only relatively minor damage, scores of outlying villages made of more flimsy mud and concrete bricks were decimated.

Mohammad-Najjar said around half the 600 villages located in the zone were damaged or destroyed.