President Donald Trump lashed out against ex-FBI Director James Comey over an Instragram post that contained an image some interpreted as a threat.

Comey, who is currently being investigated by the U.S. Secret Service, shared a picture on Instagram on May 15 with the number “8647” fashioned out of seashells on a beach, with a caption: "Cool shell formation on my beach walk.

James Comey was the FBI director who reopened an investigation into Hillary Clinton's emails, two weeks before the 2016 presidential election. He is now being investigated by Trump for accusations of threatening an assassination.