- Two quakes hit northwest Iran near city of Tabriz
- Quakes were 6.4 and 6.3 in magnitude
- Casualties may rise as rescuers reach new areas on Sunday
- Some 16,000 people given emergency shelter
Thousands huddled in makeshift camps or slept in the streets after Saturday's quakes in fear of more aftershocks, 40 of which have already struck.
Casualty figures are expected to rise, Iranian officials said, as some of the injured were in critical condition while others were still trapped under the rubble inaccessible to rescue workers hampered by darkness in the first hours after the quakes.
Six villages were destroyed and about 60 sustained more than 50 percent damage, Iranian media reported. About 110 villages were damaged in the quakes, Deputy Interior Minister Hassan Ghadami was quoted by Fars as saying.
Photographs posted on Iranian news websites showed numerous bodies, including children, lying on the floor of a white-tiled morgue in the town of Ahar and medical staff treating the injured in the open air as dusk fell.