Moscow clashes put authorities in a quandary

On Saturday, several thousand young men clashed with police at Manezh Square, just outside the Kremlin. Eighty were briefly detained, but riot police chased most of the crowd into the subway, where they rampaged through the cars threatening non-Russians. Three natives of the Caucasus were stabbed and hospitalized, police said. On Sunday, crowds appeared at Pushkin Square and at Sokolniki Park, northeast of the center. Web sites promised more to come.