RIO DE JANEIRO (Reuters) - A bus carrying journalists at the Rio Games was hit by gunfire on a highway between Olympic venues on Tuesday, witnesses said.

No one was seriously injured in the incident. The bus was making its way from the Games basketball venue to the main Olympic park when, according to passengers, two shots were heard hitting the vehicle.

Windows shattered and flying glass left two people with minor lacerations.

"We were shot at. I mean we could hear the report of the gun," said Ms Sherryl "Lee" Michaelson, a retired US air force captain who is working for a basketball publication in Rio.

Brazilian police were not immediately available for comment.

Violent street crime in Rio has left its mark on South America's first Olympic Games.

On Saturday, a bullet hit the equestrian centre, missing journalists there by just a few feet. That bullet was suspected to have been fired by a gang member trying to shoot down a police blimp or drone, officials said.