Police were called just after 2000 last night, after neighbours and some of the girl’s relatives forced open the bathroom door and found the girl and the man.
The girl was already dead.
Police confirmed on Sunday morning that the murdered girl was seven years old. The suspect is a 36-year-old man and, according to the police, they knew each other.
“The man has been arrested on suspicion of murder,” said Lars Byström at the Stockholm police.
“What we are doing now is that we are waiting to interrogate him in the hospital.”
Bro is a commuter town of around 7,000 people, situated 40kms north-west of Stockholm.