WINONA, Minn. – Police were called to the Riverway Learning Center that a 12-year-old pupil had made a playground threat about a gun. The pupil denied any threat. Police left it to the school and the parents to resolve the situation. The call to police was about 12:40 p.m. Riverway, a charter school, has a pre-K through 12th grade enrollment ceiling of 130. The school is at 1200 Storrs Pond Road on the Far East End off Old Homer Road.