Bhopal, Dec 03 (ANI): Survivors of Bhopal gas tragedy, world's worst industrial disaster which happened three decades ago, on Wednesday (December 03), recalled the night when cyanide gas in air killed thousands. In the early hours of December 03, 1984, around 40 metric tonnes of toxic methyl isocyanate gas accidentally leaked from a pesticide factory owned by US multinational Union Carbide Corp. and was carried by the wind into the surrounding slums. The government recorded 5,295 deaths. Activists estimate 25,000 people have died from illnesses in the years since. Many more, they said, are dealing with cancer, blindness, respiratory difficulties and immune and neurological disorders, but with no support. Meanwhile, Madhya Pradesh Chief Minister Shivraj Singh Chouhan along with other government officials organized special prayers for the victims and observed a moment of silence as a tribute to the victims.