Children from a German school in Buenos Aires wearing swastika armbands and fake Hitler moustaches attacked pupils from a Jewish school in a resort where several Nazi war criminals lived for decades after the Second World War, including Dr Josef Mengele, Auschwitz’s “Angel of Death”.

The incident drew swift condemnation for the pupils and the parents who were accompanying them during the school’s end-of-course trip to San Carlos de Bariloche, in the Andes.

The town became a haven for fleeing Nazis who were welcomed by the sympathetic Peronist regime.

According to witnesses, pupils from the Lanús German School arrived at a party in a nightclub dressed as Nazis.

“Some of them were in leathers with swastikas painted on their chests and backs,” Dan, one of the students who was attacked, told Argentina’s TN television channel.

“We wanted them to be thrown out of the club but they shouted 'f------ Jews’ at us and proudly showed off their symbols.”

When bouncers at the club refused to eject the pupils in fancy dress, there was a “confrontation” which turned into a fight, according to Dan.

The boys dressed as Nazis were finally expelled from the club.