CUSCO, Peru, March 8 (UPI) -- Security at the Peruvian historical site of Machu Picchu has been increased after a recent string of streakers invading the centuries-old Inca citadel.

Late last year, guards arrested two male tourists who were caught streaking at the site. More recently, a video of a couple streaking at Machu Picchu went viral on YouTube, prompting others to follow suit, The Guardian newspaper in London reported Friday.


Ricardo Ruiz Caro, Peru's new regional director of culture, announced recently that park guards will increase surveillance to "avoid these unfortunate events that threaten cultural heritage."