First Lady Melania Trump’s top policy aide, Reagan Hedlund, has left the White House after just six months on the job.

According to the outlet’s, sources briefed on the matter, Hedlund, a 28-year-old former executive assistant at the National Security Council, left the White House last week.

The Hill reported that Hedlund who joined the first lady’s staff in January as policy director, abruptly departed from her job.

Hedlund declined to provide details, but told Politico the following;

“I am very grateful to the first lady for the opportunity to help launch her policy initiative,” Hedlund told Politico.

“It was a rare opportunity to contribute at such a high level. It was a difficult decision to leave. However, I have decided to return to my roots in the foreign policy world,” she said.

First lady’s Melania Trump did not immediately reply to a request for comment from The Hill. Hedlund could not be reached.

She declined to offer additional details to Politico. The news outlet added that multiple aides in the Trump administration did not know why Hedlund departed from her role.

“She is no longer with our office and we wish her our best,” Melania Trump’s spokeswoman, Stephanie Grisham, told Politico in a statement.

Politico noted that Hedlund had previously worked under Secretary of State Mike Pompeo when he was a Republican lawmaker in Congress. She’s also worked as an executive assistant at the National Security Council.

She came into her role right as Melania Trump was making veterans issues, opioid abuse and problems facing children a core focus of her policy goals.