This is an undated image obtained from the Twitter page of Anders Behring Breivik, 32, who was arrested Friday July 22, 2011 in connection to the twin attacks on a youth camp and a government building in Oslo, Norway. Breivik is a suspect in both the shoo
This is an undated image obtained from the Twitter page of Anders Behring Breivik, 32, who was arrested Friday July 22, 2011 in connection to the twin attacks on a youth camp and a government building in Oslo, Norway. Breivik is a suspect in both the shootings and the Oslo explosion Friday. Twitter, Anders Behring Breivik, Associated Press
By Associated Press

OSLO, Norway — A police official has told The Associated Press that the bomb used in the attack at the Norwegian prime minister's office was "some kind of Oklahoma City-type" device made of fertilizer and diesel fuel.

The official said it remains unclear what kind of detonator was used for the bomb, which investigators say was packed into a panel truck and killed at least seven people when it went off.

The official was speaking on condition of anonymity because the information has not been formally released.

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A 4,000 pound (1,815 kilogram) fertilizer-and-fuel-oil bomb detonated in front of a federal building in Oklahoma City in 1995, killing 168 people.

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