Balotelli infuriated home fans with provocative gestured during the game.
This morning, Sky Italia showed footage of supporters with access to the car park beneath San Siro trying to attack the striker as he walked to his car.
Security staff were forced to intervene in order to lead him to safety.
"He's a youngster, this thing happened and in all honesty I'd prefer to think about the victory," said President Massimo Moratti.
"This is a wound that will heal and could be a life lesson that'll prove useful for him."