Overcrowded hospitals in northwest Iran struggled to cope with thousands of earthquake victims on Sunday, August 12 as rescuers raced to reach remote villages after two powerful quakes killed nearly 300 people, Reuters reported.

Thousands huddled in makeshift camps or slept in the street after Saturday's quakes for fear of more aftershocks, 60 of which had already struck. A lack of tents and other supplies left them exposed to the night chill, one witness said.

The worst damage and most casualties appeared to have been in rural villages around the towns of Ahar, Varzaghan and Harees, near the major city of Tabriz, Iranian media reported.

The U.S. Geological Survey measured Saturday's first quake at 6.4 magnitude and said it struck 60 km (37 miles) northeast of the city of Tabriz, a trading hub far from Iran's oil-producing areas and known nuclear facilities.

The second, measuring 6.3, struck 11 minutes later near Varzaghan, 49 km (30 miles) northeast of Tabriz.

More than 1,000 villages in the area were affected by the earthquakes, Ahmad Reza Shaji'i, a Red Crescent official, told the Iranian Students' News Agency (ISNA). Some 130 villages suffered more than 70 percent damage, and 20 villages were completely destroyed, he said.

National emergency head Gholam Reza Masoumi said 5,000 people are believed to be injured.