Karsten Ludvig Sølvberg (born 19 January 1905) was a Norwegian communist, trade unionist and agent during the Second World War.
Before the Second World War he was a trade unionist and member of the Communist Party. He was a telegraph clerk by occupation. [1] His union was Norsk Telegrafforbund, and he edited the union's magazine Telegrafmannen. [2]
During the occupation of Norway by Nazi Germany, the Nazis merged his union with others to form the Forbundet for Offentlige Yrker. Sølvberg was a union secretary. [3] He was initially a member of the resistance movement, and was arrested in October 1942 by account of "illegal activity". [1] He was incarcerated at Møllergata 19 from 27 October 42, and also at Victoria Terrasse. He was released on 16 April 1943. [4] He had then been subject to torture. He was pressured to denounce his communist adherence, and to become a Nazi agent with the codename S 71. [1] He is best known for unveiling the Communist Party organizational centres in 1942, which had been established in secrecy in Vikersund and Hemsedal. Sølvberg supposedly escorted Gestapo officers to both hideouts. [1] The underground Communist Party leaders Arne Gauslaa and Ottar Lie were surprised there; Gauslaa and another person were shot to death while Lie was arrested and tortured. [5] His agent practice was unveiled when Georg Angerer defected to Sweden. [3]
After the war Sølvberg was not reinstated in his job, nor in his trade union post. [6] He was however acquitted of treason by Oslo City Court in 1949, when tried as a part of legal purge in Norway after World War II. [1]