( CNN ) -- Authorities shot and killed a grizzly bear that mauled a 70-year-old man near Yellowstone National Park , a Wyoming Game and Fish Department spokesman said Saturday . Agents tracked the bear via a radio collar and killed it near the site of the attack , said the spokesman , Eric Kezsler . The Park County Sheriff 's Office had closed part of the Shoshone National Forest while they searched for the large adult male bear , which apparently attacked Erwin Frank Evert after being captured and tranquilized there by researchers Thursday . Evert was unarmed and fatally wounded , the sheriff 's office said . He was in the forest with his wife , a member of a federal team of researchers studying grizzly bears , authorities said . Members of the team had packed up their equipment and left the area after tranquilizing the bear and putting the radio collar on it , the sheriff 's office said . But officials said Evert was attacked when he wandered back into the capture area , located in the Kitty Creek Drainage . Game wardens and federal authorities began searching for the bear Friday . The 2.4-million-acre Shoshone National Forest is just east of Yellowstone National Park .
Authorities shoot bear they say killed man . The attack occurred near Glacier National Park . Researchers had tranquilized bear and a radio collar on it . Smith 's wife worked on grizzly bear research there .