A volcano-triggered tsunami leaves at least 222 people dead and hundreds more injured after slamming without warning into beaches around Indonesia's Sunda Strait, officials says, voicing fears that the toll would rise further.

Indonesia yesterday scrambled to get help into quake-hit Sulawesi island as survivors streamed away from their ruined homes and accounts of devastation filtered out of remote areas, including the death of 34 children at a Christian camp.

The death toll from Indonesia's quake and tsunami disaster nearly doubled to 832 yesterday and was expected to rise further, prompting authorities to announce mass burials in a desperate attempt to stave off disease.