The woman was seriously injured in the early-morning crash and was flown to a Stockholm hospital, police spokesman Lars Bystrom said. No one else was injured.
Bystrom said the woman was arrested on suspicion of endangering the public.
Tomas Hedenius, a spokesman for train operator Arriva, said the woman, born in 1990, stole the four-car train at a depot outside Stockholm.
Image: Emergency services attend the scene after a derailed train crashed into the side of a residential building in Saltsjobaden outside Stockholm, Tuesday Jan, 15, 2013. A woman obtained the keys to the train and drove it away before it crashed into the building. The woman was injured in the incident and there are no reports of injuries of people in the building . (AP)
Images & Text: AP