The first paragraph of the report reads:

Samsung (005930) was accused of covering up a gas leak last month that left one contract worker dead and four others injured. The company initially claimed to have the situation under control, however police have discovered that as much as 10 liters of hydrofluoric acid may have leaked into the environment endangering thousands of people who live and work in the area. The incident occurred on January 28th when one of the pipes leaked at Samsung’s main semiconductor factory in Hwaseong, a city located roughly 40 miles south of Seoul.

For the rest of the report, see:

http://news.yahoo.com/fatal-accident-samsung-factory-may-endangered-thousands-022547221.html