Opponents of Jaroslav Tvrdik, head of the Czech Republic’s Social Democratic Party, gave the political leader a taste of their disapproval Wednesday, pelting him with eggs during a rally for the European Parliament elections in Prague, Czech Republic.

And this is just the latest in a string of recent attacks against the Social Democratic Party involving eggs.

More than 40,000 people joined the "Eggs for Paroubek in every town" campaign, opposing the Social Democratic Chairman Jiri Paroubek, on social networking Web site Facebook. Groups have also disrupted a number of Social Democratic rallies across the country.

Czech police are now paying closer attention to the election rallies, police spokeswoman Dagmar Bednarcikova told a Czech newspaper Wednesday.

The European parliament will hold elections across the bloc's 27 members in early June.

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