An 18-year-old has been arrested on suspicion of actual bodily harm, criminal damage and assaulting an emergency worker in St Neots.
Officers attended Market Square in the early hours of Sunday morning (August 2) following reports of violence.
The teenager has since been released under investigation while further enquires are carried out.
In a post of Policing Huntingdonshire, it read: “We’re aware of a video circulating on social media regarding a disorder in Market Square, St Neots in the early hours of Sunday morning.
“The video shows a private security vehicle, which looks similar to a police vehicle, circulating the area.
“We’re working with businesses in the area and our partners to prevent further anti-social behaviour in the area.”