Updated

The chairman of the House Intelligence committee says the ongoing NSA search of telephone records thwarted an attempted terrorist attack in the United States in the last few years.

Republican Rep. Mike Rogers of Michigan defended the telephone records collection at a Capitol Hill news conference on Thursday. He said the information culled from the records enabled U.S. authorities to stop a "significant case."

He declined to provide additional details but said he was in touch with U.S. officials about providing more information.

He said the NSA search is for business records and is constantly being reviewed. He said nothing is done without court approval.