Kristian Welhaven

At the same time German troops entered Oslo after having captured Fornebu Airport in an airborne operation, their seaborne attack having been blunted at the battle of Drøbak Sound early that morning.

[6] Welhaven had been contacted by Minister of Justice and the Police Terje Wold in the early hours of 9 April and had been authorized to use all municipal powers to prepare Oslo for war, especially in case of bombing.

[7] Wold had also told Welhaven to arrest Norwegian Fascist leader Vidkun Quisling if the opportunity presented itself.

[12] Welhaven, together with Director of Public Prosecutions Haakon Sund and Mayor of Oslo Trygve Nilsen, also signed radio broadcast announcements on 12 April which quoted the Hague Conventions on the laws of war.

The same announcements warned that francs-tireurs taking part in irregular fighting would be punishable by death in a court-martial.

[2] Welhaven, together with Supreme Court Justice Paal Berg, Oslo mayor Trygve Nilsen and Commissioner of finance Hartmann approached the German authorities to have Quisling's government removed.

[19] He was transferred to Germany where he was kept in custody from 1943 to 1945, first in the Gestapo prison in Prinz-Albrecht-Straße in Berlin, and later interned in Landsberg am Lech, Bavaria with his wife Margit and daughter Gerda.

[quote 1][2]" After World War II Welhaven worked with rebuilding the police force of Oslo, being its leader until his retirement in 1954.

In the early post-war days surveillance operations were carried out by individuals outside of government control, and by Western intelligence services.