Five people were arrested after crowd trouble overshadowed Chorley FC’s biggest game in 15 years on Saturday.
A crowd of 3,223 crammed into Victory Park for the top-of-the-table match with Chester City.
However extra police had to be drafted in after some ugly scenes before the match involving a small section of rival fans.
They pulled down fencing that had been erected to segregate the Chorley and Chester supporters.
After the game - which Chester won 1-0 - opposing supporters ran on to the pitch and there were reports of violent skirmishes outside the ground.
Police and officials at the club say the vast majority of the bumper crowd were well behaved but were let down by a small number of so-called supporters hell-bent on causing trouble.
Around 50 officers were involved in the police operation to maintain order.
Supt Richard Robertshaw said: “I am disappointed and saddened by the behaviour of a small minority of ‘fans’ who attended the match on Saturday afternoon.
“It was clear that some individuals from both Chorley and Chester were intent on causing trouble in the ground.”
The trouble erupted despite a massive operation by the Chorley FC, that saw an extra 37 match-day stewards drafted in.
After the game life-long Chorley fan Mark Locke wrote on the club’s website: “The actions of the so called ‘supporters’ will no doubt be aired in the coming days.
“Here and now is not the time to go into detail, other than to say they have brought shame on the club and should be banned for life from entering Victory Park.
“Many of the people involved have no doubt not even stepped foot into the ground for years, if ever.”
He added of the Chorley troublemakers: “We are ashamed and embarrassed of their behaviour and of the fact that they claim to support our club.”
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