Take a look at the wiki entry for the Westminster Bridge terrorist incident and see they have a certain number killed (6 including the perp) but they did not all die on the day of the incident. Some were put on life support. I'm just getting fed up at people telling me what killed means and what I should think it means, as if some people are more qualified than others to understand definitions. Killed means causing the death of someone by other than natural causes. Died means when life expires.