Robinson says Railey was arrested after walking away from officers. Railey was charged with disorderly conduct and taken to the Story County jail.
Railey, a 6-foot-11 native of Beaverton, Ore., averaged two points a game as a freshman last season.
Hoiberg says in a statement that he's still gathering information on the incident but is disappointed in Railey's behavior since it was a second offense.
Railey was also suspended by Hoiberg in January for violating team rules after a single-car accident early on New Year's Day.
