Five of the 20 men arrested in connection with the disorder at the recent Preston v Blackpool clash are from the Fylde coast, police said.
Four of the men arrested on suspicion of public order and criminal damage offences are from Blackpool and one man is said to be from Poulton.
The local derby was marred by a number of incidents of disorder where hundreds of pounds worth of damage was allegedly caused to parts of the stadium.Detectives are now appealing for the help to identify another man who attended the Capital One Cup game at Deepdale on August 5.
At the end of the match, a steward was trampled by a police horse after grappling with a fan – believed to be a home supporter – and suffered injuries as a result.
Det Insp Paddy O’Neill, who is leading the investigation said: “Over the past few weeks we have been studying CCTV footage from various sources, and we are keen to trace and question this man in relation to the assault on the steward.
“We now believe the man ran onto the pitch from the Sir Tom Finney stand so it is likely that he watched the game from that stand. He is a stocky white male, with a shaven or bald head, and was wearing jeans and a distinctive dark green jacket with a hood, and a full length red zip. If anyone can identify this man I would urge them to come forward and contact the police.
“The investigation into the incidents before, during and after the fixture continues, and will continue for the foreseeable future. Further arrests are anticipated.”
The other 15 men arrested are said to be from Preston.
Call Preston Police on 101.