One person died and two others were hospitalised on Monday after they inhaled toxic vapours while cleaning a reactor used for chemical processes at a factory located in an industrial area in Ghatkopar, a Fire Brigade official said. 

Three people had entered the reactor, which was used for some chemical processes, for cleaning in a factory located in the Kurla Industrial Estate in Narayan Nagar around 8.15 am. But, they got trapped inside the reactor and subsequently fell unconscious after inhaling toxic vapours, he said.