Violence has between anti-Islamist protesters from the English Defence League and riot police at a May Day march in Aylesbury, Buckinghamshire
Demonstrators hurled coins, glass bottles, plastic flag sticks and cans at officers after the event.
Around 200 protesters burst through police lines and scuffled with officers armed with riot shields, batons and dogs.
Onlookers said there were no apparent serious injuries.
Around 1,000 members of the far-right group had marched to the town's Market Square, chanting and waving flags.
One onlooker said: "As the protesters came to leave the square members of the EDL thought they weren't been allowed out quickly enough and some began pushing and shoving.
"Soon missiles were been thrown and riot police had to be called in to calm the situation down.”
Local Area Commander Superintendent Richard List, of Thames Valley Police, strongly condemned the violence.
He said: "It is disappointing that the EDL has not continued to protest in a peaceful manner.
"Based on the experience of other towns, it was essential that the police, with the support of its partners, were geared up to deal with as many protesters as turned up.
"We made it very clear to the EDL at the outset that we would not tolerate any disorder on the day and that there would be a significant police presence.”
A Thames Valley Police spokesman said the violence lasted for only a "short period", adding: "EDL surged against police lines against wishes of their stewards. Officers contained them before allowing dispersal."
Around 75 members of the Unite Against Fascism group – who oppose the English Defence League – gathered in the town but later left.
The Telegraph
