pretty good running synopsis here;
note;
Update at 10:14 a.m. ET: Although the source of the blast is unclear, Al-Jazeera TV notes that Norwegian prosecutors on Tuesday filed a terrorism charge against Mullah Krekar, founder of the Kurdish Islamist group Ansar al-Islam. Mullah Krekar is accused of threatening a former minister, Erna Solberg, with death, Al-Jazeera says.
17 dead in Oslo bombing, shootings; Norwegian held - On Deadline - USATODAY.com
The Al-Jazeera article that that came from also says
Independent Norwegian television TV2 reported, without disclosing its sources, that the detained man has links to right-wing extremism.
Deadly twin attacks shock Norway - Europe - Al Jazeera English
They have a man or the man. That's the important thing. Norway say we may get more information tomorrow.