It does say "The suspect, who has been detained on suspicion of terrorist offenses, was known known for having “been sympathetic to extremist organizations,” Jonas Hysing of Sweden’s national police said." So, a terrorist attack. More info will be coming. In Europe, they aren't as hysterical as Americans, where if you don't start speculating about motives right away they accuse you of a cover up. They are simply behaving like adults, waiting to get more info before making any statements. It's smarter to do that than leap in and make unfounded claims.