4 died (factory employees) and 11 were injured in an incident of a toxic hydrogen sulphide gas leak on 20.09.2011 (Tuesday) at 1915 hr in a pharma factory plant operations, located in Tarapur, India. The gas spread 5 km around the plant. The residents in the nearby area were evacuated after the incident. The leak was arrested. The plant did not request fire services as they thought that they can handle the situation and that there is no fire.
The nearest railway station is about 1 km from the factory. Three persons of the factory were booked for the incident, as per reports. The plant is located in an area along with about 1250 factories and few residential areas.
http://www.youtube.com/watch?gl=IN&v=HbP_BmhpmaI
http://articles.timesofindia.indiatimes.com/2011-09-21/mumbai/30184327_1_gas-leak-fire-brigade-plant-officials
http://indiatoday.intoday.in/story/thane-gas-leak-3-company-officials-booked/1/152110.html
http://www.dnaindia.com/mumbai/report_tarapur-power-plant-gas-leak-kills-4-workers_1589638
http://www.thehindubusinessline.com/companies/article2473702.ece