One of the suspicious white-powder envelopes sent to an ICE office in Manhattan this week included a menacing note saying it was delivering “karma” for migrants, law-enforcement sources told The Post.

The sinister note — found in one of five envelopes containing boric acid discovered Thursday in the ninth-floor mailroom at 26 Federal Plaza — appeared to include lyrics from the Anthrax song , “A Skeleton in the Closet” and bore a return address from an ICE building in Washington, DC, sources said.

“Deprive innocent people from their freedom and walk all over their human rights is a crime that has to be punish by men laws and divine law, nobody can escape from karma NOTE EVEN YOU,” read the letter, which was viewed by The Post. 3

“THE POWDER IS XARHTNA, WE HAVE YOUR OFEICE AIR AN

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