 During the 1948 Arab–Israeli War, Tobianski was working for the Jerusalem Electric Corporation and had knowledge of the exact location of several arms manufacturers in Jerusalem.These factories had received direct hits from Jordanian artillery.On 30 June 1948, Tobianski was taken into custody and interrogated by Be'eri, David Kron, Binyamin Gibli and Avraham Kidron during a drumhead court-martial.