BOISE, Idaho (AP) — Idaho lawmakers are advancing a bill to prohibit the state from investigating, arresting or prosecuting people who kill federally protected gray wolves.

Republican Rep. Phil Hart's bill also prohibits state employees from helping federal agencies to arrest or prosecute someone who kills a wolf.

The Lewiston Tribune reports the legislation cleared a House committee Monday but was put up for amendments.

The bill faces changes amid concerns it would prevent Idaho game wardens from even passing along information to their federal counterparts. State officials say that's a problem, considering wardens take oaths to cooperate with "all legally authorized agencies in the pursuit of justice.''

Wolves in the Northern Rockies are listed as endangered under court order, but state and federal officials have been looking for ways to curb their population.