Police in Spain used rubber bullets and truncheons to disperse protesters in a square in Barcelona as cleaning crews cleared their tent camp. Twelve people were taken to hospital.
It was the first police attempt to clear demonstrators since a nationwide movement against unemployment, welfare cuts and corruption began on 15 May in city squares across the country.
Demonstrators returned to the square after police left, but only a few hundred remained by mid-afternoon on Friday.
Voters punished the ruling Socialist Party for the grim economy in municipal and regional elections on 22 May and gave a huge victory to the opposition Popular Party.