Three Killed at Mushroom Farm

6 September 2008: Three men died and three others were injured at a mushroom farm in Canada.  It was reported that the men were mixing manure into compost when a pipe ruptured in a nearby pump-house.   The first man entered the pump-house and started to gag.  Others were overcome when they went to his aid.  It was thought that high levels of hydrogen sulphide were released from the pipe.

Source: CBC News Canada