A passenger bus has plunged from a 30-foot high viaduct in central Rio de Janeiro, killing at least seven people and closing the major thoroughfare where it landed.
At least six more people were injured in Tuesday's accident, said Sergio Simoes, who heads Rio state's Civil Defense department, adding that the number of injured was likely to rise. Simoes said the dead were five men and two women.
He said it was unclear how many were aboard and whether any of the passengers were children.
Helicopter footage aired by Globo television network showed emergency response teams evacuating the injured from the overturned bus as rush-hour traffic stood at a standstill on Avenida Brasil, the highway that serves as the main entrance to Rio. Some of the injured were evacuated by helicopter.
The cause of the accident was not immediately known, but Globo cited eyewitness as saying that a dispute between a passenger and the driver might have sparked the crash.
Buses are the main form of public transit in the city of 6 million, despite their sometimes questionable safety records and often uncomfortable overcrowding levels. Rio's buses, operated by private companies, don't have seat belts, and it's not unusual for up to several dozen people at a time to travel standing up. Rio's buses are also known for driving at high speeds, even in residential neighborhoods.
With two key metro stations closed pending the extension of Rio's subway, buses have taken on an even more crucial role in recent months and are the sole public transit option in poor neighborhoods ringing the city.
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