Explosion Rocks Oslo Gov't Building

An explosion went off in Olso's government headquarters early Friday, injuring several people. Prime Minister Jens Stoltenberg's office is in the building, but he is safe. A witness standing at a bus stop near the building saw the blast and watched as it shattered nearly all of the windows in the 20-floor highrise. Nearby offices, including NTB, Norway's leading newspaper and news agency, have been evacuated. The source of the blast has yet to be determined.