(JTA) — A Jewish school in Denmark’s capital city was vandalized this week — its windows broken and anti-Semitic graffiti spray-painted on the building.

Scrawled on the walls of the historic Carolineskolen school in Copenhagen were the words “No peace in Gaza” and “No peace to you Zionist pigs,” AFP is reporting.

The school’s headmaster, Jan Hansen, told the news agency that some parents kept their children home from school Friday, and that there were some children who “were sad and a bit afraid who we had to send home.”

The incident comes amid a rise of anti-Jewish sentiment and incidents in Europe, since the start of the latest Israel-Gaza conflict.

Last week, hundreds of demonstrators — many wearing traditional Jewish head coverings and other religious symbols — took to the streets in a heavily Muslim neighborhood of Copenhagen to protest anti-Semitism. Organizers called the demonstration the “yarmulke protest.”

Carolineskolen was founded in 1805 and bills itself as the world’s oldest still functioning school.