Arsenal Europa League Match vs. Cologne Delayed 1 Hour Due to Safety Concerns

Arsenal's UEFA Europa League match against Cologne on Thursday has been delayed by one hour. 

As shared by the club's official account, the decision was made with crowd safety in mind:

Cologne fans took over the British capital on Thursday. As shared by Joe Prince-Wright of NBC Sports, there were more than 20,000 of them:

Ball Street passed along apparent footage of supporters storming the barriers at the Emirates: 

ESPN's Michael Cox noted police dogs were brought in after some of the Cologne fans attacked stewards to force their way into the away section.

According to Joe Mewis and Alex Richards of the Daily Mirror, the German club were only allocated 3,000 tickets, with Arsenal warning the fans in advance they would not be allowed into the home end.