An Israeli high school student was arrested and questioned by police for doing a Nazi salute during a school trip to Auschwitz, Israeli media reported on Sunday.

The teenager from Kiryat Bialik was on his school’s field trip to Poland when he did the gesture under the entrance sign to the camp.

He was questioned for two hours by Polish police and was fined approximately NIS 1,500 after security guards observed him performing the salute. The museum also captured the incident on its security cameras; the footage was handed over to the police.

Polish police charged him with promoting Nazism, local media reported. Performing a seig heil is illegal in Poland, and carries a potential sentence of up to two years in prison.