Editor's note: This article has been updated throughout.

Reports of a suspicious package delivered to the office of U.S. Rep. John Ratcliffe Thursday brought members of the Plano Bomb Squad and HazMat team to the Grayson County Courthouse.

The incident — which local law enforcement treated as a possible hazmat situation — did not require the evacuation of the courthouse and business went on as normal, officials said.

Grayson County Sheriff’s Office Capt. Sarah Bigham said the incident occurred when a letter was hand delivered to the congressman’s office at around 2 p.m. Ratcliffe was not present at the office when the letter was delivered.

“We have talked to the person who sent the envelope and we do not feel there is any additional threat,” Bigham said shortly after 5 p.m.

By 5:45 p.m., GCSO posted on its Facebook page that the Plano HazMat team had determined the envelope not to be hazardous and no further threat existed. All units were then cleared from the scene.

Bigham said the decision to call the bomb squad for assistance came following statements that were made by the suspect at Ratcliffe’s office. The hazmat team and bomb squad arrived at the courthouse at about 4:30 p.m.