Exhausted and exposed to freezing cold, survivors of a weekend earthquake in western Iran begged authorities for food and shelter on Tuesday, saying aid was slow to reach them.

Iranian officials called off rescue operations earlier in the day on the grounds there was little chance of finding more survivors from the quake, which killed at least 530 people and injured thousands more. It was Iran's deadliest earthquake in more than a decade.

Survivors, many left homeless by Sunday's magnitude 7.3 quake which struck villages and towns in Kermanshah province along the mountainous border with Iraq, struggled through another bleak day on Tuesday in need of food, water and shelter.