The overpass was under construction at the time of the collapse.
Aerial footage showed the bridge had fallen onto a highway below, partially crushing a yellow school bus. Renata Soares, who was a passenger on that bus, told Brazil's GloboNews, "When I saw the flyover falling down, I feared the worst would happen, that the bridge would turn on top of our bus." The front end of the bus was crushed.
Another eyewitness said that when the overpass collapsed, it felt "like an earthquake. The ground shook violently. I heard a very loud bang."
It is unclear what impact, if any, the bridge collapse will have on World Cup-related traffic. Belo Horizonte is scheduled to host a semi-final match next week at Minerao Stadium, approximately two miles from the accident.