A teenager is one of two people arrested during the Wear-Tees derby today.
The arrests, by Cleveland Police, come as Middlesbrough FC took on Sunderland AFC at the Riverside Stadium.
An 18-year-old man was arrested on suspicion of historical missile throwing in connection with a reported offence, last month.
A 23-year-old man was arrested on suspicion of racially/aggravated harassment and causing alarm/distress with words.
Both men are currently in custody.