Hundreds of thousands of Argentines descended on the capital's main plaza on Friday in a show of solidarity against a shocking assassination attempt on the country's vice president a day earlier, which triggered an outpouring of support in a country gripped by deep political polarization and economic crisis.

An assailant pointed a loaded pistol from close range at Vice President Cristina Fernandez outside her Buenos Aires home where crowds had gathered Thursday night, but the gun failed to discharge.

Authorities have yet to ascertain a motive for the attack on Fernandez, a leftist former president of the South American country.