Two colonies in Worli area incentral Mumbai were sealed, disinfected and fumigated in the early hours of Monday in view of novel coronavirus outbreak, local MLA and Maharashtra minister Aaditya Thackeray tweeted.While some television channels reported that four COVID-19 cases were detected in the two localities, there was no confirmation from Brihanmumbai Municipal Corporation officials on this."Late last night 2 am onwards, Koliwada and Janta Colony have been sealed off further. Disinfection and fumigation is on along with contact tracing," Thackeray tweeted.Koliwada, home to a vast fishing community, and Janata Colony are congested localities in the metropolis.Local residents said police were not allowing people to leave or enter the area.The BMC also started a drive in the area as part of its drive to disinfect public places."In order to contain further spread of COVID-19, Worli Koliwada has been completely sealed and lockdown for public movement, in coordination with Police Dept. Disinfection and fumigation process of the complete area has been initiated, as a precautionary measure," tweeted G North ward of BMC.