Mexico shuts Cancun beach, alleges sand was stolen (AP)

A tourist watches as Mexican federal environmental authorities and navy sailors close a section of beach built by allegedly pumping sand from the ocean bottom to combat erosion at a hotel in Cancun, Mexico, Thursday, July 30, 2009. Five people were detained in the incident. While Cancun suffers severe beach erosion problems caused by recent hurricanes and storms, authorities say such unauthorized private efforts only worsen the problem. (AP Photo/Israel Leal)AP - Surprised tourists found their little piece of Cancun beach paradise ringed by crime-scene tape and gun-toting sailors on Thursday.