SAO PAULO – A commercial building in Brazil's biggest city collapsed Tuesday, killing at least six people, authorities said. Another 11 people were pulled alive from the rubble, but an unknown number remained trapped below.
Firefighters said it was not yet clear what caused the building to fall.
About 60 firefighters carefully searched the rubble, using dogs to help locate victims. Nearby vehicles were covered with chunks of concrete let loose as the building fell.
The building was either being built or was under repair. It was two stories high.
Firefighter Marcos Palumbo told the Globo TV network that "right now the work is slow, very cautious, because to pull people from the rubble we need a lot of technique and patience."