Democratic presidential hopeful Hillary Clinton was interviewed for three and a half hours by the FBI on Saturday amid a probe into her use of a private email server while secretary of state.
"Secretary Clinton gave a voluntary interview this morning about her email arrangements while she was secretary," her spokesman Nick Merrill said.
"She is pleased to have had the opportunity to assist the Department of Justice in bringing this review to a conclusion. Out of respect for the investigative process, she will not comment further on her interview."
The FBI is investigating Clinton's server to see if classified information was mishandled, a topic which has become a key issue in her presidential campaign.
Republicans have pointed to the issue to raise questions about Clinton's trustworthiness and judgement and to raise the spectre of the scandals that plagued her husband Bill Clinton's presidency.
Republican presidential candidate Donald Trump blasted Clinton after the meeting.
"It is impossible for the FBI not to recommend criminal charges against Hillary Clinton," he wrote on Twitter. "What she did was wrong! What Bill did was stupid!"
The interview came one day after Attorney General Loretta Lynch sought to reassure the public that the probe would not be tainted by political bias after she met private with former president Bill Clinton this week.
Lynch said she will follow the recommendations of prosecutors who are examining whether Hillary Clinton violated any laws through her use of the private email system.
A State Department review released in May faulted Clinton for her exclusive use of the private email server during her tenure as secretary of state, saying the practice posed a security risk and did not comply with government records laws.