U.S. law enforcement officials have searched the home of Giuliani, a lawyer who advised former President Trump, media outlets said.
Giuliani is believed to be investigating allegations of trying to obtain information that would be detrimental to President Biden ahead of last year's presidential election.
US media reported on the 28th that law enforcement officials searched Giuliani's home and office in New York, where he was a corporate lawyer for former President Trump, and seized electronic devices.
Giuliani's son criticized the investigative authorities for the search, telling reporters that he was "unbearable for being ridiculous."
Giuliani said he had been in informal diplomatic channels with the Ukrainian government, where Biden's son worked, in an attempt to obtain information that would be detrimental to President Biden ahead of last year's presidential election. Allegations have been raised.
As a result, law enforcement officials are believed to be investigating Giuliani's actions.
Giuliani responded as the mayor of New York City during the terrorist attacks in 2001 and received high praise.
On the other hand, after last year's presidential election, a voting machine maker has filed a lawsuit against Giuliani for a large amount of damages, claiming that the election was fraudulent.