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Grizzly bear hunted after killing biker in Montana

02:02

A grizzly bear attacked and killed a mountain biker one mile from a campground in Glacier National Park in Montana. This is the first bear attack the area has seen in 18 years. NBC’s Tammy Leitner reports for TODAY that law enforcement is hunting the bear as signs are posted warning tourists where the attack happened. (Run: 2:02)