WASHINGTON, Oct 10 (Reuters) - Republican Senator Marsha Blackburn wants the CEOs of AT&T T.N, Verizon VZ.N and T-Mobile TMUS.O to disclose whether they received or objected to subpoenas for phone data from eight U.S. senators that were obtained by the Justice Department during a probe of the January 6, 2021, Capitol riot, according to letters seen by Reuters on Friday.

On Monday, Senate Republicans disclosed a 2023 document that showed the FBI obtained phone data known as "toll records" from senators' phones, including Blackburn, which were tied to the investigation of the riot.

She wants the telecom companies to answer a series of questions including whether they provided "the cell phone records of their personal devices, their official government devices, or both?"

(Reporting by David Shepardson; Editing by Nia Williams)

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