The University of Iowa says 12 football players have been hospitalized for symptoms likely related to offseason workouts.

The school has declined to release the names of the players being treated.

The school said in a statement released Tuesday that the players were taken to University of Iowa Hospitals and Clinics on Monday night. The statement says they are responding well to treatment and are in safe and stable condition.

The school says they aren't sure when the players will be discharged.

Athletic Director Gary Barta says in the statement that officials must determine what happened so such an event can be avoided in the future.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

IOWA CITY, Iowa (AP) _ The University of Iowa says 12 football players have been hospitalized.

The school disclosed the hospitalizations Tuesday, but declined to release the players' names, conditions or why they are being treated. Iowa said the players are in safe and stable condition, and are responding well to treatment.

The players were taken to University of Iowa Hospitals and Clinics on Monday night. The school says it's not clear when the players will be discharged.

Athletic director Gary Barta says the next step is to find out what happened so the school can avoid such an event from happening again. A school spokesman, Steve Roe, says privacy laws prevent further comment.