SANTIAGO, Chile (AP) - More than 300 men and women undressed in a warm Saturday morning in Santiago to stage a festive protest against war in Iraq.

Police watched the unusual protest appearing even to share the humor of the demonstrators in a park in downtown Santiago.

The humorous mood did not last long. After about one hour, the demonstrators - some of them dressed again, others still naked - marched several blocks to a plaza in front of the presidential palace of La Moneda, where they tried to repeat their massive naked protest.

Police quickly sent the water truck to disperse them. An officer explained that the naked demonstration had only been authorized to be held at the park, not in front of the palace.

About a dozen demonstrators were detained, including some naked women - who were taken away by female police officers.