On 3 November, a Hungarian delegation led by the Minister of Defense Pál Maléter was invited to attend negotiations on Soviet withdrawal at the Soviet Military Command at Tököl, near Budapest. At around midnight that evening, General Ivan Serov, Chief of the Soviet Security Police (KGB) ordered the arrest of the Hungarian delegation, and the next day, the Soviet army again attacked Budapest.
The second Soviet intervention, codenamed "Operation Whirlwind", was launched by Marshal Ivan Konev. And By 21:30 on 3 November, the Soviet Army had completely encircled Budapest.