The White House announced on Saturday that the administration of US President Donald Trump has withdrawn the nomination of Adam Boehler for the position of US special envoy for hostage affairs.

Boehler, who is working to release Hamas captives in Gaza, will continue his efforts as a "special government employee," a position that does not require Senate confirmation.

"Adam Boehler will continue to work with President Trump as a special government employee focused on hostage negotiations," White House spokeswoman Caroline Leavitt said in a statement.

She added: "Adam played a crucial role in negotiating Mark Fogel's return from Russia, and he will continue this important work to bring unlawfully detained individuals around the world home."

Reuters quoted a White House official as saying that Boehler withdrew his candidacy to avoid divestment from his investment firm, stressing that the move was not related to his discussions with Hamas.

"Boehler still enjoys President Trump's absolute confidence," the official added.

Direct meetings with Hamas spark controversy

In recent days, Boehler has held direct meetings with Hamas regarding the release of detainees in Gaza, in clear violation of Washington's decades-long policy of not negotiating with groups designated by the United States as terrorist organizations.

These talks have angered some Republican senators, as well as drawn criticism from Israeli leaders, particularly after comments attributed to Boehler in which he described Hamas officials as "nice."

According to Axios, Israeli Strategic Affairs Minister Ron Dermer expressed his displeasure with Boehler during a tense phone call last week.

Bowler's role in securing Mark Vogel's release

Adam Bowler is credited with helping secure the release of American teacher Mark Fogle, who was released by Russia last February after three and a half years in prison.