In two separate incidents at religious sanctuaries, hate-spewing vandals scrawled white supremacist symbols on a historic church uptown and a synagogue in lower Manhattan, sources said.

A swastika was found Thursday morning plastered onto the St. Paul and St. Andrew Methodist Church in the Upper West Side, according to police sources.

Later on Thursday, it was reported to police that the Beth Hachasidim DePolen in the Lower East Side synagogue was defaced with the letters “KKK” enclosed in circle and the word “fu–” written underneath it, the sources said.

Mayor Bill de Blasio tweeted Thursday that “hate will not be tolerated in New York City,” and encouraged anyone with information on the two incidents to contact the NYPD.

Police are investigating both cases, according to sources, but do not believe they are related.

The incidents come at a time of national tension over the antisemitism and racism represented by the swastika and the Ku Klux Klan.