Topless protesters disrupt French far-right leader Marine Le Pen's May Day speech

The Femen activists shouted anti-fascist slogans

The Femen activists were topless (AP)

Topless protesters have disrupted a May Day speech by French far-right leader Marine Le Pen in central Paris.

The three activists interrupted the Front National leader’s address and pulled mock Nazis salutes, displaying slogans including “Heil Le Pen” and “Stop Fascism” on their breasts.

They chanted anti-fascist slogans from a balcony of a building overlooking the stage.

Ms Le Pen was using the traditional workers’ holiday to attack her political rivals, arguing that her party was “right on everything”.

“They have allowed massive immigration to install itself in France. They have unpinned the Islamic fundamentalist grenade,” she said. “We are right on everything.”

The activists who stormed the speech were from the Femen group, which has made a name for itself by pulling eye-catching stunts that feature nudity.

National Front security guards seized the protesting women, who were later arrested.

Ms Le Pen was also caught off guard when her father and the party’s founder, Jean-Marie, unexpectedly took the stage despite an internal disciplinary procedure against him over claims about the Second World War.

The Front National has risen dramatically in popularity since Mr Le Pen’s daughter took over, with polls showing Ms Le Pen as a competitive candidate for the President of the Republic.

After the leader’s speech was disrupted, the could be heard to comment: “Lots of surprises on this May 1”.

The speech was taking place at a wreath laying ceremony for Joan d’Arc, the 15th century French heroine who is sometimes used as a far-right nationalist symbol in the country.

The Front National is a far-right anti-immigration party. Its policies include cutting immigration by 90%, ending free European cross-border movement, building prisons, increasing police snooping powers, and leaving the Euro.