GREAT FALLS, Mont. (AP) — State and federal wildlife officials in Montana say they're trying to locate a female grizzly bear responsible for killing 70 sheep at three ranches in the last two weeks.

Officials tell the Great Falls Tribune they hope to locate the grizzly using a transmitter attached to her 32-pound cub's ear. The cub was captured and released June 10 after its mother killed 10 sheep.

Mike Hoggan of the U.S. Department of Agriculture's Wildlife Services says the adult bear on Tuesday and Wednesday killed 47 lambs, five ewes, five big rams and one ram lamb at a family ranch near Conrad.

Officials say the bear struck again Friday and killed two ewes at another ranch 48 miles northwest of Great Falls.