Two officers and a protester were injured when violence broke out at an anti-fascist demonstration in Brighton, police said.
The protest organised by the Unite Against Fascism (UAF) group took place at the same time as a demonstration by the English Nationalists Alliance. A Sussex Police spokesman said members of the UAF march clashed with police. Fourteen arrests were made for public order offences, assault and to prevent a breach of the peace. Two police officers and a protester were treated for minor injuries.
The force spokesman said: "Police attempted to ensure that both protests took place in a safe location, but close enough to one another to enable them to make their points peacefully. Unfortunately a small group from the counter-demonstration resisted this and threw missiles at the police. At no time did either group have the opportunity to physically confront one another, the only disorder being directed towards the police."
Chief Superintendent Graham Bartlett said: "It is our aim to allow protesters the freedom of speech to express their views safely, without causing disruption and disorder to residents, visitors and businesses in the city."