GETTYViolence scenes broke out across many European cities during May Day marches
May Day – or 'Labour Day' – is observed all over the world on the first day of May to celebrate the economic and social achievements of workers and fight for labourers rights.
In Italy, violent scenes erupted in the northern city of Turin, as demonstrators clashed with police during the traditional Labour Day march.
Riot officers were deployed after more than 200 people gathered in the Via Cesare Battisti in an attempt to divert the authorised march route.
Three people were arrested after a group began pelting law enforcement officials with eggs.
Police say a number of items used in the violence, including umbrellas and sticks, were confiscated during the protest.
Meanwhile, in France, horrfying images of police being attacked with Molotov cocktails have emerged.
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Riot police during demonstration In Paris
GETTYRiot officers are engulfed in flames as they face protesters in Paris
In Paris, riot police attempted to control the crowds at the city’s traditional labour union march.
Police fired tear gas at rowdy protesters on the sidelines of a May Day workers' march in Paris but hooded youth attacked security forces.
The annual march to celebrate workers' rights this year included calls to block presidential candidate Marine Le Pen from winning the presidency during a runoff election on Sunday.
Video showed riot police surrounding the protesters disrupting the march after isolating most of them from the rest of the crowd near the Place de la Bastille.
AFP/ GETTYProtesters launch a burning trolley towards French CRS anti-riot police officers
However, some continued to lob firebombs that exploded into flames in the street.
A policeman has been seriously burnt and two others injured in the clashes.
Television pictures showed policemen trying to shake flames from their riot gear, and of tear gas enveloping the streets around Paris' Bastille monument.
Around 250 events are planned across the country for May Day – a traditional day of protesting – with thousands of people and trade unions demonstrating in cities including Lyon, Toulouse and Strasbourg.
GETTYFlaming trolley launched at police in France during May Day protests
EPAProtests in Turin turned violent
Protesters have begun throwing smoke bombs in the Kreuzberg district of Berlin, Germany.
The streets have been filled with