They say it was a car bomb parked outside the prime minister's office - Stoltenberg was not inside though. At least two people have been killed. Police are now checking all cars arriving to and leaving from the airport. They have also advised people to leave the city center if they don't absolutely have to be there. The offices of TV2 have been closed due to a "suspicious package" being found there.
Apparently the founder of Ansar al Islam made threats against Norway recently.