Thanks to jer33 3 for pointing to this article:
===
http://www.argusleader.com/apps/pbcs.dll/article?AID=/20051002/NEWS/510020330/1001
"Chemical kills 1 in Salem
Victim was among 4 sickened at apartment building"
JAY KIRSCHENMANN
jkirsch@argusleader.com
Article Published: 10/2/05
SALEM -
ARTICLE SNIPPET: "Irene L. Schock, 81, died Saturday at Sioux Valley Hospital. She and three others from one of the buildings at Salem Apartments, 430 E. Beebe Ave., were taken to the hospital Friday as authorities evacuated the complex."
ARTICLE SNIPPET #2: "Van Den Hemel said the substance is a solid that apparently had a chemical reaction that created a gas. He declined to speculate what the substance is.
The South Dakota Division of Criminal Investigation is helping investigate."
ARTICLE SNIPPET #3: "The building probably will be off-limits to anyone "for a long time," depending on what the analysis of the substance turns up, Stiefvater said."