Welcome to bbc news. At least four people have been arrested after what what police have described as disorder at Arsenals Europa League match against fc cologne tonight. Up to 20,000 german fans are in london for the game, most without tickets. The kick off was delayed by an hour, and has only ended in the past few minutes. Its the first time in 25 years cologne has played in an International Club competition. Before the game, they were led by police through the city centre, with reports of bottles being thrown. Only 3,000 had tickets, and so the situation outside the stadium became ever more difficult, with those extra cologne supporters either trying to get in or stopping others doing so. Inside, it was clear many had managed to buy tickets from touts, with arsenal fans getting in touch with the bbc to say they were surrounded by german supporters, with others climbing over barriers to join those in the away end. 0ur correspondent dan johnson has been there. The metropolitan police
Over five years since 72 people died in an act of social murder, not a single person in corporate and political circles responsible for turning the building into a death trap has been prosecuted.