WINNEBAGO, Neb. (AP) — Federal agents are investigating the tobacco businesses run by the economic development arm of the Winnebago Tribe of Nebraska.

Investigators from the Bureau of Alcohol, Tobacco, Firearms and Explosives visited the headquarters of Ho-Chunk Inc. on Tuesday.

Ho-Chunk spokesman Sam Burrrish says the company is cooperating with investigators who are looking at records related to tobacco sales.

Ho-Chunk owns dozens of businesses in several different industries, including Rock River Manufacturing that produces cigarettes on the tribe’s reservation in northeast Nebraska.

The Winnebago Tribe also owns the WinnaVegas Casino near Sloan, Iowa.