The veteran star's residence is said to have been damaged by activists from the Republican Party of India, who had misconstrued earlier political comments made by Kher on the current Anna Hazare case in India, NDTV reports.
The actor explained: "I never said anything derogatory... I am upset and worried after this. I was in a celebratory mood when this happened... I don't think RPI has anything against me...I will not seek protection."
Kher had reportedly said: "The Constitution should be thrown out," while appearing on a TV show speaking about Anna Hazare's political fast.
The actor's wife, Kirron Kher, who is best known for playing mother figures in Hindi cinema, said that lights outside the house had been damaged in the attack.
The attack was reported to Juhu Police station in western Mumbai and a number of activists were detained.
Aside from his work as a Bollywood actor, Kher also runs the acclaimed 'An Actor Prepares' theatre school in the same area of the city.
Kher recently confirmed that he will be working with filmmaker Woody Allen on an upcoming project.