Updated

Paraguay has started to clean up a contaminated lake that is among the South American country's top tourist attractions.

A group of Korean experts began work in the Ypacarai lake in San Bernardino, near the capital of Asuncion. Nearby residents complain that the polluted lake emits a strong foul smell and they can no longer drink its waters infested with bacteria.

About 9,500 local people used to drink, cook and bathe using water from the lake. Now some use government-supplied bottled water. Others have started to dig wells looking for fresh water.