Google is conducting a broad internal investigation to determine whether Russian-linked entities used its ads or services to try to manipulate voters ahead of the U.S. election, according to a person familiar with the matter, a move that comes after Facebook Inc. FB 1.27% and Twitter Inc. TWTR 0.12% said Russian actors used their sites.

Earlier this month, the company said it found no evidence that it sold election-related ads to Russian actors.

On Friday, the company said, “We will of course cooperate with inquiries; we’re looking into how we can help with any relevant information.”

Google also hasn’t said whether it would accept an invitation this week from the Senate Intelligence Committee to testify publicly on Nov. 1 about Russian interference.

The committee also invited Facebook and Twitter.

Facebook said it hasn’t yet accepted the invitation.

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