Russian hackers have infiltrated The Bill, Hillary and Chelsea Clinton Foundation, according to a news report that comes days after disclosures that the country's operatives targeted the Democratic National Committee's computer network.

Bloomberg, citing three unnamed sources familiar with the matter, reported Tuesday that government investigators detected the data breach as recently as last week and that the attack was part of a broader campaign seeking information from more than 4,000 individuals that included political advisers, lawyers and party aides.

The report comes amid lingering questions about the Clinton Foundation's fundraising as well as allegations that the Democratic front-runner's use of a personal email server during her term as secretary of state potentially exposed sensitive information to hackers.

A spokesman told Bloomberg that the foundation was unaware of the hack.

The incident follows findings this week from cybersecurity firms CrowdStrike and Fidelis that suggest members of Russian intelligence agencies accessed the networks of the Democratic National Committee for nearly a year and downloaded data, including opposition research about Republican presidential front-runner Donald Trump. The Russian government has denied involvement.

Director of National Intelligence James Clapper has publicly warned that Trump, Clinton and Sen. Bernie Sanders of Vermont have been targeted by hackers. Analysts say intelligence on the presidential candidates would help Russian officials predict how the next administration might behave.

A hacker called Guccifer 2.0 claimed responsibility for the data breach of the DNC and posted documents purported to have originated with the commission. CrowdStrike said in a statement that the claim of responsibility was likely "part of a Russian intelligence disinformation campaign." Fidelis later reviewed the hack of the DNC and agreed with CrowdStrike's conclusions.

Guccifer posted more information on Tuesday that purportedly came from the DNC – whether the hacker was responsible for the breach or not.

The leak contained a dossier compiled by the DNC that includes Clinton's tax returns, personal financial disclosure reports, Senate travel records and contracts for paid speeches.

Among the details in those contracts, Clinton reportedly required a "standard" $225,000 fee for a speech, according to the data, along with a "chartered roundtrip private jet" that needed to be at least the size of a Gulfstream 450, and separate first-class or business airfare for three of her aides. Her standard speaking contract required "a presidential suite," rooms for staff and expenses for their ground transportation, meals and phone charges.