"Authorities said the bear family, under the tutelage of the mother,
specifically targeted campers — a sharp departure from the usual behavior of
grizzlies attacking only when threatened or surprised."
Read more:
http://www.sfgate.com/cgi-bin/article.cgi?f=/n/a/2010/07/28/national/a110010D64.DTL&tsp=1#ixzz0vChzM9x1