Buenos Aires (CNN) -- Throngs of people banged pots and pans Thursday, as they protested government policies in Argentina.

The massive march was the latest in a series of "cacerolazos," protests named for the cooking pots participants hit to draw attention to problems they say are growing in the South American nation, including crime rates, inflation and political corruption.

Many demonstrators said a key issue drove them to the streets: the possibility that President Cristina Fernandez de Kirchner could push through changes to the country's constitution and run for re-election.

"The people got tired, they really got tired of the government's lies," said Arturo Feldman, a 23-year-old student who joined the protest near Buenos Aires' iconic obelisk.