A train hit a bus trying to beat it across the railroad tracks during the Tuesday morning commute in Buenos Aires, slamming the bus into a platform and then hitting another train. At least seven people were killed and more than 160 injured, authorities said. The force of the arriving train reduced the bus to a fraction of its normal width as it became wedged against the station platform. The front of the train then collided into another train that was preparing to depart the Flores station in the opposite direction, heading downtown from the suburb of Moreno. Transportation Secretary J.P. Schiavi said children were among those injured in the accident, which happened at 6:15 local time, when many parents use public transportation to take their children to school. Helicopters helped carry the injured to at least seven hospitals around the capital.