The number of people known to have died in Indonesia in Friday's earthquake and tsunami has risen to more than 1,200, the country's disaster response agency says.

Iran Press- Asia/ The death toll jumped on Tuesday from a previous confirmed figure of 832.

The 7.5-magnitude quake struck just off the central island of Sulawesi on Friday, setting off a tsunami that engulfed the coastal city of Palu.

People there are growing increasingly desperate for food, fuel and water.

Humanitarian relief convoys entering the city are now being escorted by soldiers and police and there are fears some survivors may still be trapped under the rubble of buildings.

Everyone we meet in Palu is focused on trying to get basic goods for their families. All normal services in the town have broken down and there's little running water, power, food or drinking water. People are desperate, Reuters reported.

Suddenly the police shouted, warning everyone to back off, followed by volleys of shots fired in the air and tear gas. Some of the men threw stones at the police; for a moment it seemed it might escalate.

Rescuers are also still hunting for survivors in the ruins of a four-storey hotel in the town.

An estimated 50 people were inside the Hotel Roa Roa when it collapsed. About 12 people have been recovered - only three came out alive.

"We have to be very careful so we don't risk hurting any survivors when we move the debris," the head of the rescue team, Agus Haryono, told Reuters.

More than 600,000 people live in Donggala and Palu.

Indonesia sits on the Pacific Ring of Fire and is regularly hit by earthquakes. In August, a series of major quakes killed over 500 people in the tourist island of Lombok and destroyeddozens of villages along its northern coast.

Palu was hit by tsunami in 1927 and 1968, according to BNPB.

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