President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE's personal attorney Rudy Giuliani Rudy GiulianiThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting CIA found Putin 'probably directing' campaign against Biden: report Democrats fear Russia interference could spoil bid to retake Senate MORE reportedly planned to fly to Vienna, Austria, a day after his now-arrested associates attempted to travel to the city.

The Atlantic reported that it was unclear why Giuliani was traveling to Vienna, but that he had said he couldn't meet with one of the magazine's reporters on Thursday evening due to his expected travel.

Multiple news outlets reported that the Giuliani associates, Lev Parnas and Igor Fruman, were carrying one-way tickets to Vienna when they were arrested at Dulles International Airport in Virginia on Wednesday night.

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Giuliani told The Wall Street Journal that Parnas and Fruman were going to Vienna for business-related reasons but declined to elaborate. He said he planned to meet with them when they returned to Washington, the newspaper reported.

The Atlantic reported that when it contacted Giuliani to ask about his planned visit to Vienna on Thursday, a woman who said she was the former New York City mayor's communications director told the magazine that she would get back to the reporter on the matter.

Giuliani reportedly later texted, saying, “I can’t comment on it at this time.”

Parnas and Fruman were arrested Wednesday and were accused of violating campaign finance laws in order to give money to Republican committees including a $325,000 contribution in 2018 to a pro-Trump super PAC called America First Action.

Parnas and Fruman have also helped Giuliani with efforts to investigate Democratic presidential candidate Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE, although the charges appear to be unrelated to Giuliani's work in Ukraine.

The Journal reported that the two Giuliani associates had lunch with him at Trump International Hotel in Washington, D.C., on Wednesday, hours before they were taken into custody.