Pakistan floods damage parts of 5000-year-old ruins of Mohenjo Daro

In flood-stricken Pakistan, where an unprecedented monsoon season has killed hundreds of people and led to large-scale destruction, the rains now threaten a famed archaeological site dating back 4,500 years.

The ruins of Mohenjo Daro - located in southern Sindh province near the Indus River and a UNESCO World Heritage Site - are considered among the best preserved urban settlements in South Asia. They were discovered in 1922 and to this day, mystery surrounds the disappearance of its civilization, which coincided with those of ancient Egypt and Mesopotamia.

The swelling waters of the Indus, a major river in this part of the world, have wreaked havoc. At least 1,343 people have been killed and millions have lost their homes in the surging waters, with many experts blaming the unusually heavy monsoon rains on climate change.

The flooding has not directly hit Mohenjo Daro but the record-breaking rains have inflicted damage on the ruins of the ancient city, said Ahsan Abbasi, the site's curator.

Several big walls, which were built nearly 5,000 years ago, have collapsed because of the monsoon rains," Abbasi told The Associated Press.

He said dozens of construction workers under the supervision of archaeologists have started the repair work. Abbasi did not give an estimated cost of the damages at Mohenjo Daro.

The site's landmark Buddhist stupa" - a large hemispherical structure associated with worship, meditation and burial - remains intact, Abbasi said. But the downpour has damaged some outer walls and also some larger walls separating individual rooms or chambers.

Abbasi said the civilization at Mohenjo Daro, also known as Mound of the Dead" in the local Sindhi language, built an elaborate drainage system, which has been critical in flooding in the past.

Though the floods have touched all of Pakistan, the Sindh province has been among the worst hit.