Sen. Ron Wyden (D-Ore.) suggested on Thursday that the National Security Agency tracked or considered tracking the cellphone location data of millions of people in the United States.

During a Senate Intelligence Committee hearing, Wyden asked NSA Director Gen. Keith Alexander whether “the NSA has ever collected — or made any plans to collect — Americans’ cell site information in bulk.”

As a member of the Intelligence Committee, Wyden has access to classified information about the NSA’s surveillance programs.

“Under [Patriot Act] Section 215, NSA is not receiving cell site location data and has no current plans to do so,” Alexander responded. He said the director of national intelligence already sent Wyden a classified document with additional details about cell site data collection.

But Wyden cut off Alexander, saying the NSA chief was not answering his question.