Thousands of Argentines from all over Buenos Aires converged on the city's famous central square, the Plaza de Mayo, late Friday night as part of a massive national protest against the government and the penal financial restrictions imposed in recent weeks. But a combination of torrential rain and violent police reaction using tear gas and rubber bullets just after midnight caused many of the demonstrators to disperse. Several protestors and police were injured and stretchered into ambulances. Some demonstrators were arrested and forced to lie down on the wet roads.