WASHINGTON — Cleveland Cavaliers guard Delonte West was indicted Tuesday on additional weapons and traffic charges stemming from his Sept. 17 arrest for speeding on a motorcycle and carrying multiple weapons.

The eight-count indictment sheds no new light on why West, 26, was riding a motorcycle on the Capital Beltway in Prince George’s County, Md., at 10 p.m. with two loaded handguns and a loaded shotgun. Prosecutors on Wednesday added an 8½-inch Bowie knife to the list of concealed weapons West was carrying.