The Federal Bureau of Investigation (FBI) is scheduled to interview US Democratic presidential candidate Hillary Clinton in the coming days over her use of a private email server during her time as secretary of state.

A source close to the investigation suggested the interview may take place on Saturday at Clinton’s home in Washington, DC.

The goal of the Justice Department, which administers the FBI, is to complete the investigation and make recommendations on whether charges should be filed before the Democratic and Republican Party conventions take place later this month, the source said.

Clinton is under investigation by the FBI for using a private email server installed at her home in New York state to conduct official US State Department business.

The official communications included thousands of emails that were later marked classified by the State Department.

FBI investigators have already interviewed several of Clinton aides, including her deputy chief of staff, Huma Abedin, and former chief of staff Cheryl Mills.

The meeting comes amid the controversy involving another meeting between Attorney General Loretta Lynch and former President Bill Clinton on Lynch’s airplane on the tarmac of Phoenix’s Sky Harbor International Airport on Monday.

On Friday, Lynch acknowledged that her 30-minute private meeting with Hillary Clinton’s husband was a mistake that had cast a shadow over the email investigation and contributes to a perception of bias.

Seeking to lessen the firestorm over the meeting, Lynch said she will accept the recommendations of career prosecutors and the FBI director on whether to charge Hillary Clinton for mishandling government-related emails.

Presumptive Republican presidential nominee Donald Trump, as well as other Republicans, have said that the meeting shows Lynch is too close to the Clintons and should not be involved in the email investigation.