MADRID (AP) — A Spanish court official says two Spaniards who survived a Nazi concentration camp have testified in a suit that urges the United States to extradite four alleged former camp guards on charges of genocide.

A National Court official says Ramiro Santisteban and Jesus Tello testified Monday before Judge Ismael Moreno for a total of about four hours.

The official spoke on condition of anonymity in line with court rules.

Moreno agreed in July to consider a complaint from a human rights group that argues the four suspects should be extradited from the United States on charges of genocide under Spain's observance of the so-called principle of universal justice.

The four suspects were named as John Demjanjuk, Anton Tittjung, Josias Kumpf and Johann Leprich.

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