At least six firemen were injured when trying to put under control a big fire that broke out at a 28- storey residential building in south Mumbai Friday evening, while 17 people were rescued by firemen, said police. The 13th floor of the posh building caught fire at 19:30 local time. More than two dozen fire tenders were deployed to fight the fire. The fire caused blasts in domestic gas cylinders and spread to higher floors, trapping many people. The exact cause of the fire is yet to be known. The injured firemen were sent to hospital for treatment. The building, called Mont Blanc, is one of the high-class residential buildings in south Mumbai, where some of the wealthiest people of the city dwell in. A Xinhua reporter at the spot was barred from going inside the compound by security guards who cited safety reasons. Huge damages were inflicted upon the property by the fire as it burnt out several luxury apartments. Last month, a fire broke out at a nearby slum area a few kilometers away where the poor live.