Action could be taken against those who breached an injunction forbidding them to attend a horse drive on Sunday.
Judge Jeremy Richardson warned those attending the prohibited event in Endike Lane could face prison after hundreds turned up to a similar event last year, causing mayhem.
About 20 horse and cart riders turned up this time, despite the warning, and now Humberside Police and Hull City Council are mulling over whether to prosecute.
Jane Price, area director for Riverside, Wyke and West, said: "We are currently working with Humberside Police to establish if there has been a breach of the injunction and if any further action is needed."
Four people have been charged with minor traffic offences and footage is being reviewed.
