There are a number of factors to give the Obama administration concern about the validity of the outcome of the Iranian presidential election, White House Press Secretary Robert Gibbs said Monday.

"I think there are a number of factors that give us some concern about what we've seen," Gibbs said in a gaggle with reporters before President Obama's speech before the American Medical Association (AMA) this afternoon.

Gibbs said that the White House did not have much to add, though, beyond the statement issued by Gibbs this past weekend, and what Vice President Biden said during an appearance on "Meet the Press."

"Obviously we continue to have concern about what we've seen. Obviously the Iranians are looking into this, as well," Gibbs told reporters. "We continue to be heartened by the enthusiasm of young people in Iran."

Still, Gibbs emphasized that the administration's concern over Iran's nuclear weapons ambitions or state support of terror groups hasn't been in any way changed by the results of the presidential election and accordant turmoil and protests.