(CNN) The National Security Agency has stopped using a surveillance program in recent months that relied on bulk data collected from US domestic phone records, according to a Republican congressional official.

The program authorized under the USA Freedom Act, requires reauthorization at the end of the year and the Trump administration may not seek to extend it, according to Luke Murry, national security adviser to House Minority Leader Kevin McCarthy.

Murry's comments came on a podcast produced by Lawfare , a national security legal affairs website. The New York Times earlier reported on the comments.

The NSA did not respond to CNN's request for comment.

The NSA last year disclosed that it had found technical problems with the program that led to collection of records on US persons that it didn't have authority to collect. The program relied on phone metadata, information such as who is called or text-messaged, and the duration and time of a call or text, but not the content of the communication.

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