By Sam Youngman - 08/04/09 10:31 AM EDT
White House press secretary Robert Gibbs said that "while this solely private mission to secure the release of two Americans is on the ground, we will have no comment."
He added later in a West Wing meeting with reporters that the White House is holding back comment because the situation is "a little sensitive."
"We will have more to say on this hopefully later on," Gibbs said.
Gibbs refuted reports that the former president is carrying a message to North Korean officials on behalf of President Barack Obama, saying that is not true.
In early June, American journalists Laura Ling and Euna Ling were sentenced to 12 years of hard labor in the communist country for illegal entry and other charges.
Secretary of State Hillary Rodham Clinton has condemned the arrest and the sentencing.