[dallasnews.com] TEXAS - Irving - Multiple White Powder Scares Reported Across North Texas
"Dr. Robert Pierce Early Childhood School in Irving was just evacuated after staff opened up an envelope full of white powder. The principal’s secretary opened the letter about a quarter to three, and was subsequently held there while the children were hustled outside and a hazmat team responded to the school, 901 N. Britain Road, according to an Irving ISD spokesman."
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See also http://www.myfoxdfw.com/story/18219437/several-day-cares-churches-find-suspicious-letters
See also http://blogs.star-telegram.com/crime_time/2012/05/a-letter-containing-a-mysterious-white-powdery-substance-sent-to-a-church.html