http://news.bbc.co.uk/1/hi/scotland/north_east/8512119.stm
Police have issued a warning to Aberdeen and Celtic fans about their behaviour ahead of Saturday's game between the clubs at Pittodrie.
Grampian Police said there had been recent "isolated incidents" of sectarian and racist behaviour which was "obviously unacceptable".
Match commander Ch Supt Adrian Watson said it would not be tolerated.
He added: "The vast majority of supporters that come along to Pittodrie are extremely well behaved."