ABC News' Kate Snow Reports: Sens. Barack Obama and Hillary Clinton held a secret meeting Thursday evening in Washington, DC.
According to a well-placed Democratic source, the meeting was held at the Washington home of Sen. Dianne Feinstein, D-Calif., an early Clinton supporter who lately has been advocating for a joint Obama-Clinton ticket.
After their meeting the Obama and Clinton campaigns released a joint statement: "Senator Clinton and Senator Obama met tonight and had a productive discussion about the important work that needs to be done to succeed in November."
Shortly after 10 p.m., a van sped quickly into the side gate of Clinton's home, Whitehaven. It was unclear who was inside. Sen. Clinton has been invisible to the press corps gathered outside her home all day. To attend the meeting at Feinstein's home, she would have had to slip unnoticed past a half-dozen cameras.
In an unexpected and unprecedented move for the candidate, Obama, D-Ill., shed his traveling press corps as they got on the plane with the understanding that Sen. Obama would join after his local interviews.
Right before take off, the press corps was informed Obama would not be flying to Chicago. Instead, he would be spending the evening in Washington.
Robert Gibbs, Obama campaign communications director, originally told the press corps, "He is not going to be in D.C. tonight for awhile so he wanted to schedule meetings."
Gibbs later confirmed the meeting took place between Clinton and Obama.
“I don’t have details of the substance of the meeting,” he said. “As the primary ended, they did have occasion to meet this evening.
"Sen. Obama had talked to Sen. Clinton … was eager to do it and begin the process, as we have over the last couple days, of uniting the party, bringing the candidates together."
Gibbs said he does not know who asked for the meeting, but it was arranged through staff.
Asked if tonight's meeting would change Obama's schedule for Saturday -- insinuating that Obama might show up at Clinton's event where she plans to back him as the Democratic presidential candidate –- Gibbs said, "I don't anticipate that. The way we understand it is the event on Saturday -- and rightly so -- is for and about Sen. Clinton and the historic campaign that she ran."
ABC News' David Chalian, Eloise Harper, Sunlen Miller and Ed O'Keefe contributed to this report.