A Muslim Sunday school in Canada has apologised for anti-Jewish teachings published on its website.

The Jewish community challenged posts on the East End Madrassah's page that drew comparisons between Judaism and Nazism, and further accused Jews of being "treacherous", "crafty" and "conspiring to kill the Prophet Muhammad".

Avi Benlolo, president of the Friends of Simon Wiesenthal Centre for Holocaust Studies, noticed the material and lodged a police complaint last week.

The East End Madrassah, running for 37 years, is now under investigation for "hate crimes" by police following the complaint, confirmed Constable Rebecca Boyd.

"The onus is on them to prove to the community at large that they are not teaching hate," said Mr Benlolo.

The Toronto-based East End Madrassah religious class, run by a Shia mosque, said it "unreservedly apologises to the Jewish community for the unintentional offence.

"Our curriculum is not intended to promote hatred towards any individual or group of people," the group said.

The Toronto District School Board has not yet confirmed whether it will take any action against the group, which uses its space to teach classes.

"We will continue to work with police and take appropriate action pending the conclusion of the investigation," said board spokesperson Ryan Bird.