People took to the streets of Buenos Aires after President Javier Milei announced he would block plans to raise pensions in line with Argentina's triple-digit inflation rates.
Police used pepper spray on demonstrators and hit them with batons during violent clashes.
The president announced his plans to veto the reforms tabled by the opposition-controlled Congress in a statement posted by his office on X, formerly Twitter.
The statement claimed the bill's "only objective was to destroy the government's economic program".