Two strong earthquakes struck northwest Iran on Saturday, killing 153 people and injuring more than 1,300 as buildings were reduced to rubble, Iranian officials said.
Thousands fled their homes and remained outdoors as at least 20 aftershocks hit the area.
Casualty numbers could well rise, Iranian officials feared, as some of the injured are in a critical condition, others are still trapped under the rubble and rescuers have yet to reach some of the affected villages.
Iran is straddled by major fault lines and has suffered several devastating earthquakes in recent years, including a 6.6 magnitude quake in 2003 which turned the southeastern historic city of Bam into dust and killed more than 25,000 people.
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 at a depth of 9.9 km (6.2 miles). A second quake measuring 6.3 struck 49 km (30 miles) northeast of Tabriz 11 minutes later at a similar depth.,
