Detectives in Yorkshire want to trace a number of Millwall fans after violence erupted during their recent match with Rotherham.
Trouble began on February 28 at the Yorkshire club's New York City ground when the home side scored in the 85th minute of their crunch game against fellow strugglers Millwall.
A spokesman for South Yorkshire Police said: "A number of supporters attempted to gain access to supporters in other parts of the ground.
"Several stewards were attacked, leading to additional police resources being deployed to restore order.
"As fans left the ground, there was further disorder.
"A number of stewards and police officers sustained minor injuries during the incident."
Police now want to trace the Millwall and Rotherham fans shown in these images. Six people, including a 16-year-old from Rotherham, have already been arrested and bailed on suspicion of violent disorder.
Anyone with information should call 101 asking for South Yorkshire Police. Alternatively, call Crimestoppers on 0800 555 111.
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