An overpass under construction collapsed Thursday afternoon in southeast Brazil, killing at least two people and injuring 22 others.

The collapse of the overpass in Belo Horizonte, capital of Brazil's southeastern state of Minas Gerais, smashed and trapped several vehicles, including a passenger bus, two cargo trucks and a compact car.

The two fatal victims of the accident included the bus driver and a female bus passenger, whose child was injured.

Authorities believe the driver of the small car was also killed, but the body has yet to be recovered by rescue workers.

Part of an urban transportation improvement project undertaken for the World Cup, the overpass was not completed in time for the sporting event.

According to the website of the daily O Globo, Argentina's national football team, which is lodged on the outskirts of Belo Horizonte, passed under the same overpass on June 21, on their way to a match at nearby Mineirao Stadium.

The stadium will be hosting one of the World Cup semifinals on Tuesday.

Belo Horizonte Mayor Marcio Lacerda declared three days of mourning for the victims.