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Thousands of people were left homeless when the waves smashed homes on coastal areas of western Java and southern Sumatra.
Disaster agency spokesman Sutopo Purwo Nugroho said the death toll had climbed to 429 on Tuesday and at least 128 were missing.
Military troops, government personnel and volunteers were searching along debris-strewn beaches. Where victims were found, body bags were laid out, and weeping relatives identified the dead.