Milan said on their website on Thursday afternoon that Balotelli had bid farewell to his team-mates before leaving training.
The statement on the club's website read: "Mario Balotelli left Milanello's sporting centre at 13.30 (local time), after saying goodbye to his team-mates. "Before leaving the premises, the striker has said goodbye to members of Milan's press office."
More top news
Manchester's eye hospital is offering new treatment on the NHS for patients with age-related macular degeneration.
All change tomorrow
A woman who had just arrived back at Manchester Airport after a holiday abroad was surprised with a flash mob - and a wedding proposal.