Third collapse in three days in Italy's ancient Pompeii

The 5-Star Movement leader and comedian Beppe Grillo talks with reporters as he arrives at the RAI television headquarters in Rome, September 30, 2013. REUTERS/Yara Nardi

ROME (Reuters) - A wall in the ancient Roman city of Pompeii collapsed on Monday, the third piece of the UNESCO world heritage site to crumble since the weekend after days of heavy rain in southern Italy, authorities said.

One of the country's most popular attractions, Pompeii was preserved under ash from a volcanic eruption in 79 AD and rediscovered in the 18th century. It has become a symbol for decades of mismanagement of Italy's cultural sites after a series of collapses that have sparked international outcry.