An investigation has been launched by the US Justice Department into whether the Clinton Foundation conducted “pay-to-play” politics or illegal activities while Hillary Clinton served as secretary of state.
FBI agents from Little Rock, Arkansas, where the foundation began, have taken the lead in the probe, The Hill reported.
At least one witness has been questioned in the past month and additional actions are expected in the coming weeks.
The Hill reported that officials, who spoke anonymously, said the investigation was looking at whether the Clintons promised or performed any police favours in exchange for contributions to their charitable efforts.
It will also examine whether donors promised to make donations in return for government outcomes.
The probe may also examine whether any tax-exempt assets were converted for personal or political use and whether the foundation complied with tax laws, the newspaper cited the officials as saying.
A Justice Department spokesperson said the agency did not comment on ongoing investigations.
Officials at the Clinton Foundation have not yet responded to requests for comment.
The organisation has previously said there was never any trade in policy decisions for contributions.
Attorney General Jeff Sessions has been urged by several GOP members of Congress to appoint a special counsel to examine issues surrounding the Clintons.
Democrats have said Republicans are pursuing an illegitimate investigation into Ms Clinton in order to distract the public from the investigation into possible collusion between President Donald Trump and Russia.
