Amid PCC/ZAPU's calls for various strikes and protests, including an appeal for black children to boycott state schools, Smith's Justice Minister Clifford Dupont had Nkomo and other PCC/ZAPU leaders restricted at Gonakudzingwa in the remote south-east two days after Smith took office. The politically motivated killing of a white man, Petrus Oberholzer, near Melsetter by ZANU insurgents on 4 July 1964 marked the start of intensified black nationalist violence and police counteraction that culminated in the banning of ZANU and PCC/ZAPU on 26 August, with most of the two movements' respective leaders concurrently jailed or restricted. ZANU, ZAPU and their respective guerrilla armies—the Zimbabwe African National Liberation Army (ZANLA) and the Zimbabwe People's Revolutionary Army (ZIPRA)—thereafter operated from abroad.