So a man has been charged with 2 counts of terrorism (doesn't mean links to Al-Qaeda of course) and most reports saying, as I thought yesterday, that it's a nationalist attack and doesn't seem related to Islamic terror groups but until everything is cleared up, we won't know.
One thing, though: Top credit to the Emergency Services in Oslo particularly, who reacted quickly and cordoned off the area in a very short amount of time. Couldn't possibly have predicted the second attack, and even so they've got their man (or what seems to be their man) very quickly. Hopefully they've saved many more people than they've lost.