The Metropolitan Police and Derbyshire Police are now investigating the online racist abuse sent to West Brom forward Callum Robinson.
On April 3, Robinson was sent monkey emojis on Instagram in reply to a post after scoring twice in West Brom's 5-2 Premier League win at Chelsea.
Robinson screen-grabbed and highlighted the messages in an Instagram story and West Brom reported the abuse to the authorities.
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West Midlands Police have now transferred the investigation to their counterparts in London and Derbyshire.
Both forces told Sky Sports News on Tuesday their inquiries are ongoing and no arrests have been made at this stage.
In April, Instagram removed one account and a number of offensive comments after Robinson was abused on the platform.
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