An investigation has been launched at a German potash mine after three workers died from breathing in carbon dioxide.
The incident happened near the town of Unterbreizbach in the east of the country. The men were aged 24, 50 and 56.
Carbon dioxide occurs naturally in potash which is mined using controlled explosions.
Mine owner Rainer Gerling explained what happened:
...
http://www.euronews.net/
