JAKARTA - Indonesian archeologists have planned to conduct excavation again in a cave in South Sumatra of the country in April as they predict there are still many prehistoric neo-mongoloid human bones in the cave, an official said on Monday.

A national archeologist team had conducted four excavations in Tiger Cave, Baturaja, Ogan Komering Ulu District, and unearthed prehistoric relics in the site, head of Ogan Komering Ulu Tourism Office Aufa Sarkomi said in South Sumatra.

"During the last two months, the national archeologist team had done four excavations and will continue the dig in April as hundreds of prehistoric neo-mongoloid human bones are predicted still buried with relics inside the cave," he said, quoted by the Antara news wire.

The archeologists had found some cave paintings, funnel axes, ceramics, burial objects and 66 human bones after they dug three meters deep during the previous excavation.

According to the archeologists, the structures of the relics indicated that the cave was once inhabited by prehistoric human of the neo-mongoloid race and the location also became a mass grave in 3,000 year ago, Sarkomi said.

The found relics would be well preserved and the authorities would develop Harimau Cave, located in Putri Cave natural tourism complex of Baturaja, as one of the main tourism destination.