Local revolutionary councils formed throughout Hungary, generally without involvement from the preoccupied National Government in Budapest, and assumed various responsibilities of local government from the defunct Communist party. By 30 October, these councils had been officially sanctioned by the Hungarian Working People's Party, and the Nagy government asked for their support as "autonomous, democratic local organs formed during the Revolution".
On 30 October, armed protesters attacked the ÁVH detachment guarding the Budapest Hungarian Working People's Party headquarters on Köztársaság tér (Republic Square), incited by rumours of prisoners held there and the earlier shootings of demonstrators by the ÁVH in the city of Mosonmagyaróvár.