Law enforcement officials condemned a hate-filled letter Monday directed at several California mosques that warned Muslims to leave the country to avoid being exterminated, reports the Associated Press.

Los Angeles police are investigating identical letters received at two mosques in the city as a "hate incident," but not a crime because it does not pose a specific threat, Deputy Police Chief Michael Downing said.

Photocopies of a handwritten letter were sent by mail to at least six mosques in California and one in Georgia that was addressed to "the children of Satan" and referred to Muslims as "vile and filthy people." The letter called President-elect Donald Trump the "new sheriff in town" and said he would do to Muslims what Hitler did to Jews.

"He's going to cleanse America and make it shine again," said the letter, signed "Americans for a Better Way." ''You Muslims would be wise to pack your bags and get out of Dodge," the letter said.