Police have halted the first of several protests planned in Paris against the Group of Eight summit in France, detaining some 50 demonstrators.
The small group gathered on Thursday for a march toward what it called a "symbolic site of finance and capitalism," with plans for an unidentified "action," but dozens of police moved in and encircled the protesters.
The demonstrators were searched with their hands against a wall before being led into police vans.
The protest came hours before the start of the two-day G-8 summit in France's northern resort town of Deauville.
Several more demonstrations against the summit, which brings together leaders of the world's richest democracies, are being planned in Paris.