Hamburg suffered relegation from the Bundesliga for the first time on Saturday despite beating Borussia Monchengladbach 2-1, and the end of the game was delayed by fans tossing flares on to the pitch.
They had been the only side to play every season in the Bundesliga since it was formed in 1963 and have a clock in the stadium which was counting the time they had been in the league.
Police and security staff had to settle things down and the game was eventually finished after a 10 minute delay. Wolfsburg beat Cologne 4-1 and Hamburg needed them to lose to stay up - when news of the result trickled through, the trouble started.
Hamburg have survived relegation by the skin of their teeth over the previous four seasons and although a late revival under Christian Titz helped their bid to stay up, in the end they could not manage it.