CLEAN : Norway PM says it is "a very dark day," Oslo shooting likely "an attack by an extreme islamist"

The transcript describes a tragic event in Oslo, where a terror attack occurred during a time of expected celebration. The attack, suspected to be by extreme Islamists, resulted in two deaths and 21 injuries. The situation is under investigation, and the community is left in fear.

What was the general atmosphere in Oslo during the incident?

What event is described as having occurred in Oslo?

What type of attack is suggested to have occurred in Oslo?

How many people were reported killed in the incident?

What was the public's reaction to the incident in terms of safety?