Two buildings collapsed in downtown Rio de Janeiro on Wednesday, in the latest incident highlighting the failure of authorities to improve the city's infrastructure. Rescue crews pulled four people alive from the debris. Ricardo Moraes/Reuters
Firefighters carry the body of a victim among the debris of a collapsed building in Rio de Janeiro, Thursday morning. Ricardo Moraes/Reuters
Firefighters worked through the night sorting through the debris of a collapsed building in Rio de Janeiro. Ana Carolina Fernandes/Reuters
Rescue workers carry an injured victim after a building collapsed in Rio de Janeiro, Brazil. Felipe Dana/AP
Firefighters carry the body of a victim among the debris of the collapsed building in Rio de Janeiro. Ricardo Moraes/Reuters
Rescue workers carry an injured victim. There is no official word on deaths, but Globo television cites unidentified Brazilian authorities as saying two bodies have been found so far. Felipe Dana/AP
Firefighters work among the debris of the collapsed building. Ricardo Moraes/Reuters
A general view of the debris from the collapsed buildings. Rescue crews pulled four people alive from the debris by midnight on Wednesday. Ricardo Moraes/Reuters
Three buildings in Rio de Janeiro collapsed late Wednesday. The latest in a string of construction woes, the accident is raising concerns about preparation for the 2014 World Cup and 2016 Olympics.
ByAndrew Downie, Correspondent
The collapse of three buildings in the center of Rio de Janeiro sounds a sharp cautionary note for Brazilians as the country rushes to build homes, hotels, transports links, and other infrastructure projects ahead of the 2014 World Cup and 2016 Olympics.