Washington, May 6 (IANS): The Federal Bureau of Investigation (FBI) has interviewed several of Democratic presidential frontrunner Hillary Clinton's closest aides, including her longtime adviser Huma Abedin, about her secret email server, the media reported on Friday.

The probe is still ongoing, but so far investigators have not found evidence to prove that Clinton willfully violated the law, officials told CNN.

In recent weeks, multiple aides have been interviewed -- some more than once, the officials said.

A date for an FBI interview of Clinton has not been set, these officials said, but is expected in the coming weeks.

The probe remains focused on the security of the server and the handling of classified information and has not expanded to other matters, the officials said.

FBI officials overseeing the probe now expect to complete their work in the next few weeks and then turn over the findings to the Justice Department, which will make a final decision on whether to bring charges against anyone.

The emails have affected Clinton’s presidential campaign from the start and have damaged her standing among many voters, who question her honesty.

Clinton set up the server at her home in New York in 2009, soon after she became state secretary.

Her messages were erroneously shielded from disclosure for six years, until she belatedly returned some 30,000 to the department in December 2014.

Clinton said there were 30,000 other messages from her time in office that were strictly private and did not implicate her government activities. She declined to turn over those messages, saying the law gave her the obligation of deciding what was official and what was personal.