Argentina went to the polls in a parliamentary election widely seen as a test for the rule of President Cristina Kirchner and her husband Nestor.
Up to 28m people are eligible to take part in the ballot for the parliament seats.
After a six-year rule, the Kirchner couple is struggling to keep a hold on Argentina's Senate and faces the prospect of losing the majority in the lower house of Congress.
Nestor Kirchner led the nation through its recovery from the 2001 financial crisis.
His wife Cristina has failed to live up to promises to reduce poverty as president.
Argentine soldiers face torture charges
At least 70 Argentine soldiers are to be charged in 80 cases of torture committed by the country's army on its own ranks during the Falklands War against Britain.
A federal appeals court in the southern city of Comodoro Rivadavia upheld a decision by a trial court that the alleged torture are considered crimes against humanity and can therefore not be denied.
President of the Centre for Falkland Islands Eduardo Alonso said: 'We have been fighting for 27 years for this to become known, we are really satisfied.
'Next week, more soldiers will report about abuses they have suffered.'
He cited several types of torture, including simulated executions and death by starvation.
Prosecutors are investigating the deaths of soldiers Rito Portillo, in an alleged execution, and Remigio Fernandez, who was abandoned on the islands as punishment.
Argentina and Britain fought a bloody war over the islands, known in Spanish as Las Malvinas, between 2 April and 14 June 1982 that left 649 Argentines and 255 Britons dead.
The archipelago in the southern Atlantic has been under British control since 1833.
The conflict erupted when Argentine forces invaded the islands, prompting Britain's prime minister Margaret Thatcher to deploy naval forces to retake the territory.
Plaintiffs before the courts were enlisted as conscripts when military service was compulsory at the time of the war, under the dictatorship of General Leopoldo Galtieri.
Some 30,000 people disappeared during General Galtieri's rule (1976-1983), according to rights groups.
