Northamptonshire Police said “a number of men” were involved in an incident near the ferris wheel.

Eyewitnesses said there was “blood and ear bites,” the Northampton Chronicle reported.

A spokesman for the force said: “The incident happened near the ferris wheel when there was an altercation between a number of men with two of them being taken to hospital as a result.

“Four men, aged 40, 35, 35, and 30, have been arrested in connection with this incident.

“The area was very busy at the time of the incident and officers are appealing for anyone who may have any mobile phone footage of what happened or anyone who witnessed what took place.”

Witnesses should call police on 101 or contact officers at the circuit quoting incident number: 22000378649