Nigel Farage, the leader of the Brexit movement, has been named a "person of interest" in the investigation into the Trump campaign's ties to Russian officials, according to a report.

Sources with knowledge of the investigation told the Guardian that FBI investigators turned their attention to Farage because of his relationships with people connected to the Trump campaign and WikiLeaks founder Julian Assange.

Farage visited Assange at the Ecuadorian embassy in London earlier this year, and WikiLeaks is believed to have worked with Russia to publish thousands of hacked emails from Hillary Clinton's campaign aides.

Farage's spokesman told the Guardian he never worked with the Russian government.

"Nigel has never been to Russia, let alone worked with their authorities," the spokesman said.

The former leader of the U.K. Independence Party isn't a target of the investigation, and he has not been accused of wrongdoing.

However, sources told the Guardian that Farage was close to people at the center of the FBI's investigation.

"One of the things the intelligence investigators have been looking at is points of contact and persons involved," a source told the Guardian. "If you triangulate Russia, WikiLeaks, Assange and Trump associates, the person who comes up with the most hits is Nigel Farage."

Farage has links to Roger Stone, who served as an informal adviser to President Trump. Stone has admitted to communicating with a hacker the intelligence community believes is an agent for the Kremlin, Guccifer 2.0.

He also has ties with people close to Trump, and the president himself. He met Steve Bannon, a top adviser to Trump in the White House, in 2012, spoke at a Trump campaign event last year, and spent time with Trump after his election victory.

Farage said in a statement to a British freelance journalist that he was "laughing so much" about the storiy.

"This hysterical attempt to associate me with the Putin regime is a result of the liberal elite being unable to accept Brexit and the election of President Trump," Farage said.

"For the record, I have never been to Russia, I've had no business dealings with Russia in my previous life and I have appeared approximately three times on RT in the last 18 months. I consider it extremely doubtful I could be a person of interest to the FBI as I have no connections to Russia."