The federal probe into US President Joe Biden's son, Hunter, is advancing, with prosecutors obtaining intelligence from associates regarding his foreign income, including Ukraine, the Wall Street Journal reported on Monday in light of Hunter returning to the spotlight over certain activities and relations in Ukraine.

Moscow had claimed that Hunter Biden helped finance military research into dangerous pathogens at Biolabs in Ukraine, and that was proven to be true via emails from his infamous laptop.

According to The Journal, prosecutors are also closely inspecting Biden's relationship with a company that handled some of his finances, and it revealed that prosecutors from the US attorney's office in Delaware have been after information regarding money he had received several years ago from Burisma Holdings Ltd., in addition to how he used said funds.

People familiar with the matter, as cited by the WSJ, said prosecutors have had the payments from Burisma in their iron sights, saying those funds had flowed to Rosemont Seneca Bohai LLC before landing in Biden's pockets between 2014 and 2019. It is noteworthy that Biden held a board seat at the table in Burisma, which gained him some $50,000 a month.

The state of Delaware is trying to see if the president's son had violated tax or other laws through his dealings and business endeavors in Ukraine, China, and Kazakhstan, among other places.

The newspaper also highlighted how Hunter Biden had used his family's name in business dealings when on the table with tycoons in Europe and China, who were seeking to better their credibility or even gain a foothold in the United States as means of establishing grounds for business in the country.

It was a win-win situation for all the parties involved, as they both benefited from the Biden family name, which enabled the businessmen to enhance their credibility and establish business ties in the US and enabled Biden to maintain his lavish lifestyle.

People involved in the matter do not know when the probe will be concluded; however, they clarified that the progress made thus far does not necessarily mean that prosecutors will end up pressing charges against Biden.

Emails recovered from Hunter's abandoned laptop show that he played a major role in the acquisition of millions of dollars in funding for Metabiota, a Department of Defense contractor specializing in research on pandemic-causing diseases that could be used as bioweapons, which proved the Russian allegations against Biden.

Following the verification of Moscow's reports, the Russian State Duma asked President Biden to explain why his son had a hand in funding the bio labs in Ukraine.