One of the two Soviet-born businessmen who helped Rudy Giuliani dig dirt on Joe Biden also works for the legal team of a Ukrainian oligarch who faces bribery charges in the US and is fighting extradition, according to lawyers for the businessmen and the oligarch.

Lev Parnas — one of the two Giuliani associates who were busted this week on federal campaign finance charges — served as a translator for lawyers repping oligarch Dmytro Firtash, Reuters reported.

Parnas was arrested along with Igor Fruman on unrelated charges that included illegally funneling $325,000 to a super PAC backing pro-Trump candidates.

Both men had worked in an unspecified capacity for Firtash before Parnas joined the Ukrainian’s legal team, sources told Reuters.

House Democrats launched the impeachment inquiry over allegations that President Donald Trump pressured Ukrainian President Volodymyr Zelensky to help investigate Biden, a top contender for the Democratic presidential nomination.

Giuliani was probing allegations that Biden, when he was veep, sought the firing of Ukraine’s chief prosecutor to halt the investigation of a gas company on which his son Hunter Biden was a board member.

The Bidens have denied the claims, and the Trump camp has produced no evidence to support the assertions.

Firtash, one of Ukraine’s wealthiest businessmen, is battling extradition by US authorities on bribery charges from Vienna, Austria, where he has lived for five years.

Parnas and Fruman had one-way tickets to Vienna when the feds busted them Wednesday at Dulles International Airport in Virginia, though it was unclear if they planned to meet Firtash.

Federal prosecutors in Illinois said in court papers in 2017 that Firtash was an “upper-echelon” associate of Russian organized crime.

He was indicted in 2013 and charged with bribing Indian officials for access to titanium mines.

Firtash has denied any wrongdoing.

Firtash was the unnamed foreign national “financing” the activities of Parnas and Fruman, the source familiar with their business dealings told the news service.

The source did not detail their specific work for the oligarch or how much money he had paid them and over what period.

Lawmakers want to question the pair about their involvement in Giuliani’s investigation as part of the impeachment inquiry.

Giuliani told Reuters in an interview that Parnas and Fruman – US citizens who were born in Ukraine and Belarus, respectively – had helped “find people for me in Ukraine.”

In recent months, Parnas was working for Firtash’s legal team, Joe DiGenova and Victoria Toensing, pro-Trump lawyers who often defend the president on cable TV and who worked on Firtash’s criminal and extradition cases.

“Mr. Parnas was retained by DiGenova & Toensing, LLP as an interpreter in order to communicate with their client Mr. Firtash, who does not speak English,” the Washington-based firm said in a statement.

DiGenova and Toensing did not comment further.

John Dowd, the lawyer representing Parnas and Fruman, confirmed that Parnas had worked for Firtash’s legal team as an interpreter.

Dowd also told Congress that both men worked for DiGenova and Toensing.

On Oct. 3, Dowd wrote Congress to say the two men could not provide certain information about Ukraine because they were partially covered by attorney-client and other legal privileges.

Dowd based the privilege claim on the fact that the two men assisted lawyers DiGenova and Toensing; that they had worked for Giuliani; and that Giuliani had previously represented them in their personal and business affairs.

Giuliani told Reuters the two men had been to Vienna — where Firtash lives — three to six times in the last two months but declined to comment on the reasons for their travels.

“They could be involved in business with each other,” Giuliani said. “It’s possible. I don’t know. They may be involved in his defense.”

Firtash is a former supporter of Ukraine’s ousted pro-Russian president Viktor Yanukovych.

He made a fortune selling Russian gas to the Kiev government.

An Austrian court in June cleared the way for his extradition to the States, but Firtash’s legal team continues to fight it.

With Reuters