Part of a coastal cycleway in the Brazilian city of Rio de Janeiro collapsed, killing at least two people. Witnesses said five people were on the path when about 50 meters crumbled into the shoreline, in late morning local time. Search operations are now underway. The elevated path was built ahead of the Rio Olympics this summer. The cause of the collapse is not yet known, BBC reported. The bike lane was built on metal stilts, next to a seafront road. An eyewitness, told O Globo newspaper (in Portuguese) “People stopped on the bike lane. They were taking pictures of the waves; they were huge. Then I saw the biggest one ever. “It lifted the cycleway and a piece came off. I saw the people falling. It is really sad.” Rio de Janeiro has committed to linking up all the city’s coastal bike lanes ahead of the Olympic Games. Work started in January 2014. This section of the project was opened in January and cost 45 million reais ($13 million).