A 15-year-old girl has become the youngest female to be banned from football matches following a riot after a Portsmouth game.
Felicity Thorpe admitted being part of a crowd of more than 300 who went on the rampage following the Pompey-Southampton derby.
Around 400 police officers were needed to quell the violence near the Fratton Park stadium after Portsmouth won the match 1-0.
Pony-tailed Thorpe, aged 14 at the time of the game on March 21, was spotted on CCTV dressed in a Portsmouth shirt and throwing at least 16 missiles - including stones and rubble - at police, Portsmouth Magistrates Court was told.
At the court hearing on Wednesday, she pleaded guilty to violent disorder and was sent to a young offenders' institution after being given a detention and training order for eight months.
She was also given a six-year banning order from matches.
The court ordered that the girl could be named.
Prosecutor Nick Hawkins described the violence as "the worst disorder in Portsmouth for 20 years".
He added: "She was there throughout the disorder after the game.
She said in interview that she had been hit by a baton earlier in the evening and felt she could get back at the police by throwing missiles at them."
The court was told Thorpe had a record of 17 previous offences, the most recent of which were common assault and assaulting a police officer.
She was in city council care at the time of the offence.
She was seen on the CCTV with a 10-year-old boy, who became the youngest to receive a referral and banning order from magistrates on May 27 for his part in the disorder.
Shocked. I couldn't believe my eyes when I read this. Totally... shocking...
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