An envelope containing a powder labeled “weaponized anthrax’’ was sent last night to the West 106th Street apartment of a New York Times editor and her husband, cops and other sources said.

A large contingent of cops and feds responded. Police later said the powder turned out to be harmless.

The recipients were Susan Chira — a 30-year Times veteran who was recently named assistant managing editor for news after years as a foreign editor — and her husband, Michael Shapiro a writer and Columbia Journalism School professor, a source told The Post.

A swastika was printed on the envelope.