The authorities are investigating a threatening letter that was sent to the Manhattan home of Eric Trump, son of presidential candidate and provocateur Donald Trump. Trump's wife reportedly opened the envelope.

The Secret Service, FBI and NYPD are participating in the investigation. The NYPD said, "At approximately 7:15 p.m., the NYPD responded to a residential building at 100 Central Park South to investigate a report of a suspicious letter received by a tenant. The letter has been removed and is being examined by law enforcement authorities. No injuries have been reported in connection with this incident."

According to CBS News , "A source close to the investigation said the letter had a Massachusetts postmark and warned that if Donald Trump doesn't withdraw from the race for the Republican presidential nomination -- paraphrasing -- harm will come to the kids.... [The source] said the envelope contained suspicious white powder that's been sent to a lab for testing. The source said a preliminary field test indicated the substance didn't appear to be hazardous."

Hacktivist group Anonymous says they have hacked Donald Trump's information "[releasing] what it claimed was Trump's Social Security number, and a number it claims is his cell phone number as well as public information such as his birth date, children’s names, and company address in addition to outdated information such as his legal representation."