(The Hill) – The Secret Service is conducting a “personnel investigation” after an agent attempted to smuggle his wife on board a plane headed to Scotland for President Trump’s recent trip. 

“The aircraft, operated by the U.S. Air Force was being used by the Secret Service to transport personnel and equipment,” a Secret Service spokesperson told The Hill.

“Prior to the overseas departure, the employee was advised by supervisors that such action was prohibited, and the spouse was subsequently prevented from taking the flight,” they added. 

The agent flew his wife from Dallas to Maryland where she received a full briefing from top agency officials about the five-day working holiday, according to The Telegraph, which also reported she was granted access to the visitor lounge at Joint Base Andrews.

The Secret Service spokesperson said the event had “no impact to our overseas protective operations.”

Trump returned from Scotland on Tuesday following a meeting with British Prime Minister Keir Starmer and the opening of his new golf course outside Aberdeen, dedicated to his late mother. 

The agent incident comes almost a year after Secret Service details were blamed for an assassination attempt on Trump due to security lapses. A 20-year-old shot at Trump, grazing his ear with a bullet while he was speaking at a campaign event in Butler, Pa.

Secret Service Director Kimberly Cheatle resigned following the backlash from the near-death event.