According to News of the World (quote provided by @RobPattzNews because the site is paid/subscription only):

We’re told exclusively that the photographer who took those pictures camped out for two days in a wooded area. He reportedly avoided search dogs and 60 armed soldiers. According to the president of the Rio Film Commission, Breaking Dawn filming in Brazil wrapped today. Back to Baton Rouge and then Vancouver!

@lightboxgallery added,

news of the world bought the robsten bikini beach pics. these were the ‘more salacious’ photos i was told about! about 7 hours ago via web

source / via: spunk-ransom