The Premier League outfit tried to lure the Netherlands international away from San Siro, but their approach was firmly rejected, according to the player's representative
The Premier League side are looking to add some more depth to their midfield in order to be able to compete in several competitions right until the end and they saw Van Bommel as the perfect addition.
Nevertheless, Milan swiftly turned down City's approach as they consider the 34-year-old to be an important first team player.
"Manchester City made an approach for Mark, but Milan's response was very clear. He is not for sale at any price," Raiola said to Voetbal International.
"City were looking to add to their ranks because they will be without Yaya Toure for a while during the African Cup of Nations. They know that Mark forms an excellent partnership with Nigel de Jong. That's why they made an approach for him."
Van Bommel joined Milan from Bayern Munich in January 2011 and helped them to the Serie A title in his first year at San Siro. He has a contract with Milan until the summer of 2012.