In a later appearance on Fox News, King said 11 Secret Service agents have been sent back to Washington to be interviewed, and said his investigation would focus in part on how to prevent this from happening again.

"What happened was wrong, we have to find out why it happened, and it can't be allowed to happen again," King said. "Having said that, I do think that Director Mark Sullivan moved quickly, he moved effectively, as did the field agent in Miami, which has jurisdiction over Colombia.

"Right now, it's going the right way; we have to make sure it doesn't happen again," he said, adding that he would probably hold a hearing on the matter at some point, after the committee completes an initial investigation.

House Oversight and Government Reform Committee Chairman Darrell Issa (R-Calif.) said on CBS over the weekend that he is not sure if his committee would hold hearings, but said he would be looking "over the shoulder" of the government investigation.