Madrid- Prosecutors at Spain's National Court on Friday sought international arrest warrants for three alleged former guards of Nazi concentration camps.

The trio, now in their 80s, are under investigation after Spanish survivors filed a complaint against them.

The prosecutors are seeking lengthy jail sentences for Johann Leprich, Anton Tittjung and Josias Kumpf.

The three committed genocide and crimes against humanity between 1942 and 1945, the prosecutors said.

The three have lived in the United States, which stripped them of citizenship.

Suspects in the case also include John Demjanjuk, who was deported to Germany from the United States recently to face charges of taking part in the killings of tens of thousands of Jews.

The Spanish complaint was filed by survivors who were in the concentration camps of Mauthausen, Sachsenhausen and Flossenburg.

More than 7,000 Spaniards are estimated to have been at the camps during World War II. More than 4,000 of them died. (dpa)