Football fans piled on to the pitch after a match between Oxford United and Lincoln on November 30, while a group of about 20 people raised fears of a disturbance in the car park.
But police, who were called to the scene at about 4.50pm, said today they arrived to find only boisterous fans and the situation was kept under control.
No fighting occurred between fans, although one person was arrested for breach of the peace, but was not charged.
Oxford United chairman Firoz Kassam later reassured fans that, despite the incident, it would be safe to attend next Sunday's FA Cup derby with Swindon.
Last week Oxford United fans were blamed for an hour-long riot, in which a policeman had one of his arms slashed.
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