A Wall Street Journal expose revealed that a Chinese businessman is under investigation by the FBI after he used funds to bankroll a media company with ties to a former aide to President Donald Trump, Steve Bannon.

"Federal Bureau of Investigation national security agents in recent months have asked people who know both men for information on Mr. Guo’s activities, including the source of funds of a media company linked to him that hired Mr. Bannon in 2018 as a consultant, the people said," according to the Journal. "As recently as last week, the FBI met with one person familiar with the companies tied to Mr. Guo, the people said. The probe has been underway for more than six months, and prosecutors from the U.S. Attorney’s offices in Manhattan and Brooklyn have been involved.

US Secretary of State Mike Pompeo on Wednesday welcomed Egypt's release of a US citizen but urged the ally to stop harassment of others.

Mohamed Amashah, 24, was freed Monday, nearly 16 months after he was arrested in Cairo's Tahrir Square for holding up a sign seeking the release of prisoners, according to human rights campaigners.

A dual US-Egyptian citizen who lives in New Jersey, he had gone on a hunger strike this year to protest his conditions.

"We thank Egypt for securing his release and his repatriation," Pompeo told a news conference.

"But at the same time, we urge Egyptian officials to stop unwarranted harassment of US citizens and their families who remain there," he said.