JAKARTA, Sept. 29 (Xinhua) -- At least 30 people were killed in Palu, capital of Indonesia's Central Sulawesi province after it was hit by a powerful earthquake and ensuing tsunami on Friday, local media quoted hospital staff as saying on Saturday.

A tsunami up to 2m (6 feet) high swept through Palu at dusk after the sleepy but growing tourist resort was rocked by a 7.5-magnitude earthquake.

"Bodies of victims were found in several places, because they were hit by the rubble of collapsing buildings or swept by tsunami ... but we are still collecting data," Sutopo Purwo Nugroho, National Disaster Mitigation Agency spokesman said on Saturday.

Doctor Komang Adi Sujendra told Metro TV that 30 people were killed and their bodies taken to his hospital, adding another 12 injured needed orthopaedic surgery. National Disaster Mitigation Agency spokesman Nugroho declined to give an official death toll.

The Palu area was hit by a lighter quake earlier on Friday, which destroyed some houses, killed one person and injured at least 10 in the fishing town of Donggala, closest to the epicentre, authorities said.

The U.S. Geological Survey put the magnitude of the second quake at a strong 7.5, after first saying it was 7.7.

The quake and tsunami caused a power outage that cut communications around Palu. On Saturday, authorities were still having difficulties coordinating rescue efforts without power and communications as the area was rocked by aftershocks.

Metro TV played an amateur footage which showed water remaining from the tsunami, a collapsed bridge, large cracks in roads and buildings badly damaged.