I have issued a European arrest warrant and she was arrested yesterday by Spanish police, says chief prosecutor Lindha Strömberg to TT.
It was on January 31 that two men, 60 and 65 years old, were found dead in a villa in Piteå.
A 30-year-old man was arrested the day after and is detained, suspected of murder. Another 40-year-old man was arrested later, and the now-arrested woman was arrested in absentia.
The trio is suspected of having murdered the men jointly and in agreement, according to Strömberg, who does not want to go into possible motives.
The now-arrested woman has not yet been questioned by Swedish police, who have requested her extradition from Spain.
It will take at least a week, ten days.
