Montana's attorney general is objecting to a U.S. government policy that bars firearms dealers from selling guns or ammunition to medical marijuana users.

Steve Bullock writes U.S. Attorney General Eric Holder in a Monday letter that the federal government should act carefully "when its laws and policies involve conflicts with those of the states."

The Bureau of Alcohol, Tobacco, Firearms and Explosives last month notified firearms dealers nationwide that medical marijuana users are not exempt from a federal law making it illegal for a drug user or addict to possess a gun or ammunition, even if they are participating in a state-sanctioned program.

Bullock says the ATF's letter raises serious constitutional, policy and practical concerns.

He says he wants to work with the U.S. government on a reasonable solution.

Associated Press