Cheshire Police launched an investigation following the allegations in the Sun newspaper.
The police said they were "aware of a video circulating on social media" of an alleged incident in Wilmslow on Sunday but no arrests have been made.
The PA news agency said it understood Walker was contesting the allegations.ufabet เว็บตรงไม่ผ่านเอเย่นต์
Walker's agent and City have both declined to comment.
Asked about the matter before second-placed City's Premier League trip to Crystal Palace on Saturday, Guardiola said: "It is a private issue. We solve it internally with him. This is not the place to talk about private situations."
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