Hillary Clinton gave a "voluntary interview" to the FBI on Saturday regarding her email arrangements while she was secretary of state, her campaign said. "Secretary Clinton gave a voluntary interview this morning about her email arrangements while she was Secretary," spokesman Nick Merrill said in a release. "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." According to the AP and other news outlets, the interview lasted about 3 1/2 hours and was held at FBI headquarters.