And two weeks ago, after the fires in Ukraine hit the forest less than a dozen kilometers from Chernobyl's power plant, inspectors marked a radiation spike in part of the irradiated exclusion zone.
Chief Inspector Mark Pannone, who led the policing operation at the match, said the situation was dealt with "swiftly and robustly".
Detective Chief Inspector Mark Dunne told the BBC, "There appear to be two groups of young people involved in this incident and opposing each other".
Chief Inspector Mark Bownass, head of West Yorkshire Police's roads policing unit, said: "We believe the minibus at this time was heading to a hen-party in Liverpool.
Detective Chief Inspector Mark Preston, from the Surrey and Sussex Major Crime Team, said: "This is a tragic incident which has shaken the close community in Fetcham.
Earlier, Detective Inspector Mark Pearson said the force was doing everything it could to find the men responsible for the attack.
Detective Chief Inspector Mark Preston, of the Surrey and Sussex major crime team, said: "We are still in the very early stages of the investigation but we need to trace Viktoras Bruzas as a matter of urgency.
Following the guilty verdicts, the investigating officer, Detective Inspector Mark Lawson, said: "It sends a clear message that if you are armed with a knife and prepared to use a knife you have got to accept the consequences of your actions.
Detective Inspector Mark Raymond, from Scotland Yard's Police Central e-crime Unit (PCeU), said: "This was a sophisticated plot that could have led to the loss of a very large amount of money from the bank and is the most significant case of this kind that we have come across".
Detective Chief Inspector Mark Roters, of Grey Mare Lane CID, said: "Many families, including women and young children, attend football matches so it is totally incomprehensible that a small number of mindless thugs would incite violence when they are surrounded by people clearly terrified by their actions.
"You can let your guard down — people are sitting down and talking and using their laptops," said Deputy Inspector Mark DiPaolo of the 84th Precinct in Brooklyn Heights, home to a Court Street Starbucks that has been the scene of four bag thefts this year.
