A flyover has collapsed onto vehicles in the Brazilian Football World Cup host city of Belo Horizonte, killing two people. The concrete and steel bridge, which was under construction, fell onto traffic on a busy highway. The front of a commuter bus was crushed along with two apparently unoccupied construction lorries. A car was also reported crushed. It is unclear if people remain trapped under the rubble. The south-eastern city is due to host a World Cup semi-final match next week.