The anti-capitalist Occupy movement says several of its supporters have chained themselves to the pulpit of St. Paul's Cathedral.
The action marks one year since the movement's protesters began their camp outside the cathedral.
The St Paul's camp was forcibly removed by authorities back in February this year.
City of London Police are at the cathedral but the women from the anti-corporate group are understood still to be inside.
More top news
A faithful pet macaw refused to leave its owners side, even when he had to pose for a court booking mugshot.
A mystery pilot has unleashed his or her creative side by navigating an aircraft to draw several pictures in the sky with its flight path.
The ex-Eastenders star told fellow I'm A Celebrity contestants that he has not seen her since she was born more than four decades ago.