A minor has been apprehended, suspected of attempted murder of an 80-year-old man in Hässelby strand on Thursday evening, according to the police on their website.
The man was assaulted during an evening walk. His injuries are not life-threatening.
One person has been under "constant surveillance to prevent new violent acts", according to the police. A house search was conducted in the morning to secure technical evidence.
The police are working on the assumption that the incident is connected to a previous attempted murder in Hässelby on July 18.