Tsunami survivors in India's Andaman Islands have accused the authorities of underplaying the extent of devastation and failing to hand out aid.
Frustration boiled over in the town of Campbell Bay when a crowd demanding food and water assaulted an official.
A disaster management committee is meeting in the capital, Port Blair, to assess the relief effort.
Nearly 9,000 people are known to have died across India, 700 of them in the islands, with thousands more missing.
ANDAMAN AND NICOBAR
The worst-hit place on the mainland is Nagapattinam, in the southern state of Tamil Nadu, where more than 5,500 people died.
It is believed more than 1,000 children were killed as they sought refuge in a school in one outlying village.
At least 140,000 people, mostly from fishing families, are in relief centres receiving aid from private sources and Indian charities.
In a national appeal on Saturday, Indian Prime Minister Manmohan Singh asked for donations to boost the government's $232m relief package, AFP news agency reported.
India says it does not need contributions from foreign governments - and has itself promised to help neighbouring countries - but is accepting aid from international relief agencies.
'Dying of hunger'
But the BBC's Geeta Pandey in Port Blair says that many people in the island chain are questioning whether the aid will get quickly enough to those affected, in view of the scale of the disaster and the manner in which the relief operations are being carried out.
Refugees arriving at relief camps in the capital on Friday said the situation was desperate in some areas.
"There is nothing to eat there. There is no water. In a couple of days, people will start dying of hunger," said Anup Ghatak, an evacuee from Campbell Bay on the southern tip of the chain, quoted by AP news agency.
Some people are saying the administration's claim that help has reached all the affected regions is incorrect.
About 3,000 people are still thought to be missing on the islands.
Some may be alive in jungles, though smaller and smaller groups are returning.
So far, 712 people are confirmed dead.
The heaviest destruction is in the Nicobar islands, the southern part of the archipelago.
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