A victim is carried to a waiting ambulance in central Oslo, Friday July 22, 2011, following
an explosion that tore open several buildings including the prime minister's office.
(AP Photo/Berit Roald, Scanpix, Norway)

Emergency workers, left, attend the scene as the building burns after a powerful explosion
tore open several buildings in Oslo, Norway, Friday July 22, 2011. 
(AP PHOTO / Holm Morten, Scanpix)

Blood smears the pavement, as a victim is treated outside government buildings in the centre of Oslo,
Friday July 22, 2011, following an explosion that tore open several buildings including the prime
minister's office, shattering windows and covering the street with documents.
(AP Photo/Fartein Rudjord)

An injured woman is helped by a passerby, in a doorway in Oslo, Norway, Friday July 22, 2011, following an
explosion that tore open several buildings including the prime minister's office, shattering windows
and covering the street with documents and debris.
(AP Photo/Morten Holm, Scanpix, Norway)

The scene after an explosion in Oslo, Norway, Friday July 22, 2011. A loud explosion shattered
windows Friday at the government headquarters in Oslo which includes the prime minister's
office, injuring several people.
(AP PHOTO / Holm Morten, Scanpix)