Rescue services and several police patrols have been alerted to Våtsjön in Karlskoga.
– There are two people, probably a skater, who have gone through the ice. At our arrival, one was found on land, but the other was left in the water, says Henrik Winkler, guard officer at the rescue service.
The injury situation for those affected is unclear, but both have been loaded by ambulance and taken to hospital.
According to the rescue service, both people should be adults.