detonate in Roodepoort at 00:40, causing structural damage to the Department of Internal Affairs offices and the Police Station. August 6 – A bomb explodes at Temple Israel in Hillbrow just before Marais Steyn is due to speak there. There are no injuries. 20 – A bomb causes R100,000 in damage to a sub-station near Mamelodi. 20 – The United Democratic Front is launched. 26 – A Limpet mine explodes at the Ciskei Consul General's offices in the Carlton Centre, Johannesburg, injuring one. September 8 – Two bombs damage sub-stations in Johannesburg, in Randburg and Sandton. 11 – More sub-stations are damaged by Limpet mines in Johannesburg, in Bryanston North and Fairlands. 12 – Ciskei offices in Pretoria are damaged by a Limpet mine. 13 – A bomb explodes at 19h45 in the Rowntree's factory in Umbilo, Durban. 29 – The Police defuse a bomb on an electrical pylon in Vereeniging. October 11 – Limpet mines explode at 02:20 and damage a large fuel storage tank, three rail tankers and one road tanker at Warmbad. Two more devices, set to explode 1 hour later, are found on the door of the Civil Defence office. P.W. Botha was due to speak in Warmbad. 14 – Two electricity pylons near Pietermaritzburg are destroyed by Limpet mines at 02:00 and 03:00. November 1 – Buses at a municipal bus depot in Durban are damaged by a bomb that explodes at midnight, the railway line at Germiston is damaged by a bomb, Police defuse a bomb on the railway line near Springs. 1 – The South African Defence Force launches Operation Askari. 2 – A white referendum on a new Constitution to provide for a White, Coloured and Indian Tricameral Parliament yields a 66% yes vote. 2 – A bomb explodes at 02:55 at the Police workshop in Wentworth, Durban and damages vehicles and the adjacent Alan Taylor student residence. 3 – The Bosmont railway station is damaged by a bomb, the Bosmont-Newclare railway line is damaged in an explosion, the railway line near Germiston is damaged by an explosion, Police defuse explosives on the railway line near Springs and electrical pylons are damaged by two explosions near Durban. December 3 or 7 – A bomb explodes at the office of the Department of Community Development in Bree Street, Johannesburg. 8 – The railway line 1 km from Bloemfontein is maliciously damaged and a