Three Norwegian brothers of Iraqi descent were charged with terrorism after an explosion at the USA embassy in Oslo caused minor damage but no injuries.Prosecutors stated that the suspects intended to cause mass casualties and are now investigating if the attack was a state-sponsored mission commissioned by Iran.Authorities also remain concerned about potential links to organized crime and proxy networks as they examine the technical sophistication of the device.Recent statements confirmed that these individuals, who were previously unknown to law enforcement, are residents of the capital.