Lon Nol initially refused to countenance Sihanouk being deposed as Head of State; to force his hand, Sirik Matak played him a tape-recorded press conference from Paris, in which Sihanouk blamed them for the unrest and threatened to execute them both on his return to Phnom Penh. However, the Prime Minister remained uncertain as to whether to instigate a vote in the National Assembly. On the night of 17 March, Sirik Matak, accompanied by three army officers, went to the Prime Minister's residence and compelled a weeping Lon Nol to sign the necessary documents at gunpoint.