Someone is sending racist letters emblazoned with a swastika and President Trump’s “Make America Great Again” slogan to several businesses from Borough Park in Brooklyn to Harlem, police sources said.

The mailed letters started arriving Friday. The recipients include a kosher bakery and a meat market in Brooklyn, the Harlem Business Alliance and a Starbucks.

Cards inside the envelopes include incendiary rhetoric about Jews, blacks and gay people.

As of Wednesday, the NYPD had collected nearly 10 of these letters, which were postmarked in New York. The Hate Crimes Task Force is working to identify the sender, with assistance from the US Postal Service.