At least two dead as motorway collapses in Belo Horizonte
Fire services dispatched 11 engines and a helicopter to the scene to aid those trapped in the wreckage.
The accident occurred in the north of the Minas Gerais capital, where the Argentina football have been based throughout their World Cup campaign in the Cidade do Galo sporting complex.
The overpass, part of works on a motorway that links the Confins airport to Pampulha, collapsed onto the street below as a city bus was passing, crushing part of the vehicle under the weight. Two cars and a lorry were also trapped in the accident.
The cause of the collapse was unclear. The overpass was part of a network of bus lanes that Brazil planned to have ready for the World Cup, but was not finished on time.
"We were traveling normally and then there was a terrible noise," Renata Soares, who said she was on the bus at the moment of the accident, told GloboNews TV. "I am sure that more people in other cars were underneath the debris."
A World Cup semi-final match will be held in Belo Horizonte next Tuesday. The stadium has already hosted five games.