Six fire tenders were rushed to the spot and the fire-dousing operation was underway, fire brigade sources said.
The fire started sometime after 9.30 pm, they said, adding that cause of the fire was not known yet.
Photos: Shah Rukh Khan, Shweta Bachchan at Karan Johar's book launch
Photos: Sunny Deol with sons Karan and Rajvir at Mumbai airport
Photos: 10 beautiful moments that capture winter around the world
Photos: Karisma Kapoor, Preity Zinta, Shraddha Kapoor at Mumbai airport
Spotted: Anushka Sharma and Diljit Dosanjh at Mumbai studio