Cheshire Constabulary has launched an investigation following a number of incidents in Warrington town centre.
Officers are aware of a number of assaults which are believed to have taken place in the Bridge Street area between 3pm and 6pm on Thursday 2 May.
Two people sustained injuries and were taken to hospital - both of whom have since been discharged.
No arrests have been made and enquiries are ongoing.
Chief Inspector Simon Meegan said: “We are aware there has been a lot of talk, videos and speculation about what happened on social media but we need to hear from people who were there at the time and witnessed what happened.
“In particular, we want to hear from anyone who was in the area at the time and recorded any of the incidents on their mobile phone.
“This is a complex investigation, which involves a large number of people and we are treating this matter seriously and asking for the public’s help in tracing those responsible.
“Should anyone else who was in the area at the time feel that that they were a victim of crime please contact us on 101.
“We will not tolerate disorder or any level of violence in Warrington, whatever the motivation, and I would like to thank members of the public who have already provided information to assist the police investigation.”
Anyone with information that may aid the ongoing investigation should call Cheshire Constabulary on 101, quoting IML 390092, give the details via https://cheshire.police.uk/contact/general-enquiries or contact Crimestoppers anonymously on 0800 555 111.
Anyone who filmed the incidents can submit the footage online at: www.cheshire.police.uk/advice-and-support/roads-and-vehicle-safety/submit-dashcam-footage.