All of those arrested have been released on police bail pending further inquiries.

Officers have pledged to continue their crack down and will be making more arrests in the coming weeks.

They were questioned by detectives investigating the incident, which happened as Sunderland AFC supporters returned from a pre-season friendly against Hearts, in Edinburgh.

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Chief Superintendent Neil Mackay, head of the force's Operations Department, said: "Since this incident happened an investigation has been under way to trace those involved and bring them to justice.

"The public can be reassured we are targeting the small minority who go out of their way to bring shame and fear on law-abiding football fans."
Detective Chief Inspector Mark Anastasi added: "There will be more arrests over the coming weeks and if you were involved in the disorder you will be caught."

At the time of going to press, police were unable to confirm whether Newcastle United fans were also among those arrested.

The incident, on August 8, has sparked stinging criticism over how it was policed and the subsequent assessment by the Independent Police Complaints Commission (IPCC).

Northumbria Police claimed the violence was sparked by fans who had planned a fight with Newcastle United hooligans, while supporters say it was caused by police mismanagement and that officers used excessive force.

Three Black Cats fans needed hospital treatment.

The Football Supporters' Federation (FSF), which has been helping SAFC fans caught up in the disorder, has now formally submitted its complaint about IPCC North East commissioner Gary Garland.

The national group, based in Ashbrooke, wants a full investigation and a new commissioner to consider witnesses evidence, not just CCTV footage.

The FSF has listed 12 areas it feels need investigation and explanation, including the "appropriateness of the use by the police of emotional public relations material" on the injuries to its dogs.

Chairman, Dr Malcolm Clarke, said: "The FSF is, and always has been, totally opposed to football-related violence and disorder, wherever it occurs and by whoever it is committed.

"For that reason, when such a serious incident as this occurs, it is vital that it is thoroughly and professionally investigated and is seen to be so.

"If this does not occur then the confidence of football supporters, not only in Sunderland but nationally, in both the police and the IPCC will be seriously eroded, which is not in anyone's interest.

"And it will fuel the belief that there is in some police forces some institutionalised prejudice against football supporters as a whole."