There were anti-austerity demonstrations in several debt-strapped European countries on Saturday.

In Spain, activists marked the one-year anniversary of the founding of the "15 M" movement, with nationwide demonstrations. Protesters took to the streets of Barcelona, with organizers claiming up to 300 thousand people took part.

Demonstrators march during a protest to mark the anniversary of the beginning of the "Indignados" movement in Barcelona, Spain, Saturday May 12, 2012. Spanish activists angered by grim economic prospects planned nationwide demonstrations Saturday to mark the one-year anniversary of their protest movement that inspired similar groups in other countries. The protests began May 15 last year and drew hundreds of thousands of people calling themselves the Indignant Movement. The demonstrations spread across Spain and Europe as anti-austerity sentiment grew. (AP Photo/Emilio Morenatti)

In Hungary, around 2, 500 far-right supporters marched through the capital Budapest, shouting slogans against the government's austerity cutbacks.

Many Hungarians are angry about a series of tax hikes and other measures which authorities say are needed to support growth and keep the country's budget deficit under control.