Ancient rock carvings at Helan Mountain in the Ningxia Hui autonomous region, China, that are estimated to be between 3,000 to 10,000 years old are seriously damaged as a result of floods, China Daily reported.

About 6,000 pieces of the rock art have been discovered on the cliffs at the pass of Helan Mountain, and most of them remained well-preserved until flooding on Tuesday caused some of the rocks to collapse.

As it was reported, the heavy rains caused the flooding. Part of the ancient rock carvings was seriously damaged by dirt and silt. Drawings which have been located on separate stones were mostly affected as a part of stones has been washed away.