Seven people died and at least 100 were injured Tuesday morning when two trains and a bus collided in Buenos Aires, UPI quoted Argentine police as saying. \"There are seven confirmed deaths. There are people in hospital now in very grave state, including children. They have severe injuries,\" said Fernando Sostre, a spokesman for the Argentine Federal Police. The crash occurred at 6:15 a.m. local time in the Flores district of Buenos Aires, CNN reported. Argentine television showed dozens of police, fire and rescue workers going through the wreckage as ambulances took the injured to hospitals.