On 8 March 1945, Soviet-controlled Hungarian radio announced that Wallenberg and his driver had been murdered on their way to Debrecen, suggesting that they had been killed by the Arrow Cross Party or the Gestapo. Sweden's foreign minister, Östen Undén, and its ambassador to the Soviet Union, Staffan Söderblom, wrongly assumed that they were dead. In April 1945, W. Averell Harriman, then of the US State Department, offered the Swedish government help in inquiring about Wallenberg's fate, but the offer was declined. Söderblom met with Vyacheslav Molotov and Stalin in Moscow on 15 June 1946. Söderblom, still believing Wallenberg to be dead, ignored talk of an exchange for Russian defectors in Sweden.