Barton, 24, was suspended for the last two games of City´s season by former manager Stuart Pearce after a training ground bust-up with the Frenchman, which also resulted in an internal investigation.
Dabo was left needing hospital treatment and later spoke to police about the alleged assault and a police spokesman confirmed: "A 24-year-old man has been arrested in connection with a Section 20 assault following an incident when a 30-year-old man was assaulted at Carrington."
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