Dozens of people have been arrested in New York after police shut down a protest against Wall Street financial firms.

The organiser of the demonstration, a group calling itself "Occupy Wall Street", used social media to call for peaceful protests against what they describe as corporate greed in America.

They had hoped to turn the sit-in into an American version of Tahrir Square - a reference to the centre of the largely peaceful uprising in Egypt - before they say the police cracked down.

Al Jazeera's Barbara Benitez reports.