Reports say that Rudy Giuliani, the personal lawyer to former President Donald Trump, has had his Manhattan home searched by federal investigators.
The raid was ordered as part of a probe into Mr Giuliani’s dealings with Ukraine, officials say.
Federal prosecutors have been investigating Mr Giuliani’s role in attempting to sway Ukrainian officials to dig up political dirt on Joe Biden.
The effort to pressure Ukraine led to Mr Trump’s first impeachment in 2019.
The search warrant was executed on Wednesday at the former mayor’s Upper East Side Madison Avenue apartment building, as well as his Park Avenue office.
According to the New York Times, officials assisting in the criminal probe seized several electronic devices belonging to 76-year-old, who is also a former mayor of New York City.
The newspaper reports that federal officials are investigating whether Mr Giuliani illegally lobbied the Trump administration on behalf of Ukraine.
Mr Giuliani has previously denounced the investigation as “pure political persecution”.