The controversial “kettling” crowd control system was used by police on Rangers fans ahead of yesterday’s Old Firm derby at Parkhead.
A small band of supporters were surrounded by officers as they walked along Springfield Road near Celtic Park.
Kettling was declared unlawful in 2009, but two years later the Supreme Court ruled it was a legitimate tactic, within strict guidelines, as a way of preventing trouble if police suspected some was about to take place.
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The game finished 1-1 with Rangers getting a late equaliser in front of their new manager Pedro Caixinha.
Fans paid an emotional tribute to Lisbon Lion Tommy Gemmell during the game which was watched by singer Rod Stewart and his family.
Rangers are now 33 points behind Celtic and also trail second-placed Aberdeen by eight.
Police arrested 11 men following the match, with six of the accused, aged 18, 19, 21, 24, 26 and 39, held in custody following alleged offences in and around Celtic Park.
They were expected to appear at Glasgow Sheriff Court today charged under the Offensive Behaviour in Football Act.
Among the five other arrests, two men were given fixed penalty notices, one will appear at court at a later date and two will be reported to the procurator-fiscal.Inquiries are “ongoing” into smoke flares being set off near Celtic Park before the 12pm kick off.
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