OTTAWA — Finance ministers of the Group of 20 nations agreed Saturday to freeze the assets of terrorists and implement a sweeping U.N. resolution against terrorist financing in a show of support for U.S. goals following the Sept. 11 attacks.

With scores of riot police outside keeping protesters away from their meeting site, the ministers from the European Union and 19 nations — including the United States, China, Russia and Saudi Arabia — adopted an "action plan on terrorist financing" during talks Friday night and Saturday.

Canadian Finance Minister Paul Martin, the meeting's host, called the action plan a decisive step in coordinating global resources and support for cutting financing of terrorists such as Osama bin Laden's al-Qaeda network, blamed for the attacks.