(Ames, IA) -- Ames fire crews evacuated a 56 unit apartment building to due a carbon monoxide leak Sunday afternoon.
The Ames Fire Department found high CO levels in the apartment in the 4700 Block of Mortensen Road.
Crews went door-to-door to make sure everyone got out.
One person fell ill, but paramedics helped them recover at the scene.
Residents were able to return to the units after maintenance fixed a broken vent pipe in one of the boilers.