The man suspected of attempted murder of a 65-year-old man in the Viksäng district of Västerås has been detained, reports Vestmanlands Läns Tidning.
The detained man, who is in his 60s, is acquainted with the injured man from before.
It was on Saturday that the seriously injured man was found in a stairwell. He is said to have been stabbed near the heart. The suspect was arrested the same evening.