Five days of soccer calm ended Wednesday with a volley of bottles and chairs as dozens of German hooligans clashed with police in Dortmund before their country's pivotal win over Poland. Police arrested more than 300 German and Polish hooligans over the day.
Authorities in Nuremberg, where England's fans are congregating for their team's second match, said they were ready in case of more disturbances Thursday.
The threat of fan violence had been a major theme ahead of the monthlong soccer tournament - and England's supporters were often cited as one potential danger, the AP reports.
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