According to the US embassy in Sweden, there was an explosion at the US embassy in Oslo. In response, the embassy is warning American citizens. The US embassy in Sweden is urging Americans to keep a low profile after the explosion at the US embassy in Oslo.
The cause of the explosion has not been determined, and it is unknown if there were any injuries or fatalities. Norwegian authorities have not yet issued an official response regarding the incident. The specific measures Americans are being advised to take to maintain a low profile remain unclear.