Nine people have been charged in connection with yesterday's derby clash between Manchester United and Manchester City football clubs.
All are due before Manchester City Magistrates' Court on 4 January 2013. Four other arrests were made.
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Sixteen people were injured when a train crashed into a railway station buffer on Monday.
"Our ability to pre-empt or respond to threats will be eroded if we don't keep up with our adversaries."
"You are one of the silence breakers and we all owe you a debt of gratitude."