Oslo U.S. Embassy blast leaves minor damage, no injuries

TL;DR
An explosion at the U.S. Embassy in Oslo caused minor damage but no injuries were reported; authorities have not determined a cause, no arrests have been listed, and police deployed extensive resources around the embassy as the investigation continues.
- No injuries reported after explosion at U.S. Embassy in Oslo, police say NBC News
- US embassy in Oslo hit by explosion, Norway police say BBC
- 'Loud bang,' damage reported at US Embassy in Norway; police investigating Fox News
- Explosion causes minor damage to US embassy in Oslo, police hunt perpetrators Reuters
- Loud explosion rocks US embassy in Oslo, police search for perpetrators France 24
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