So sad.
How did they get into the tunnel in the first place? I'm guessing that authorities/organisers failed to block the open end of the tunnel (or failed to block it sufficiently) so one or two people (or troublemakers) suggested they go in it and the rest of the crowd followed unawares, only to find that the other end had been blocked up sufficiently, thus trapping the people? No matter how I look at it, I can only see this tragedy as being the responsibility of the authorities and/or organisers. Even if it were troublemakers who caused it by breaking down barriers etc, well we know to expect people like that at any event like this.
Do you think this will be the end of the Love Parade? I mean, they were having trouble with the authorities already I hear, hence the change of location...