The second post, which was uploaded Monday, highlights the Great Seal of the United States. The Great Seal was adopted by Congress in 1782 and features an eagle and shield.
The announcement came in the wake of a deadly mass shooting at Brown University and an unrelated, antisemitic shooting at a Hanukkah event in Australia.
Comer made the threat in a letter to the couple's attorney, which comes after the attorney sent a letter to the committee last week outlining why the two Clintons should not be required to appear.
The strikes killed a total of eight men who were on three vessels. Three of the men were on the first boat, two were in the second and the final three were in the third.
Nearly three days after the shooting, the suspect remains at large, and Monday night, authorities turned to the public for help identifying the gunman.