Four men in their 20s, two Australians and two Canadians, have been detained in Peru after taking naked pictures of themselves at the famed Inca ruins of Machu Picchu.
Their arrests are part of a government crackdown on the growing trend of tourists stripping at the site and subsequently posting indecent photos and videos online.
Peru's Ministry of Culture has stepped up surveillance and erected signs informing visitors that getting naked at the ruins is a crime.
Machu Picchu is widely revered as a sacred place for Peruvians and is on UNESCO's list of World Heritage Sites. Stripping visitors will be expelled from the area and may face additional charges, say officials.