Plecksy in Gaborone, Botswana, killing 12 activists. Three limpet mines explode at the Natalia Development Board buildings in Lamontville. Three limpet mines explode at the Umlazi Police station in Durban. An Eskom sub-station in Durban is damaged by explosion. A bomb damages the offices of AECI, which is involved in a labour dispute. An explosion destroys a Transkei Development Corporation bulk fuel depot in Umtata and disrupts water and power supplies to the town. Insurgents throw petrol bombs and hand grenades at the home of Amichand Rajbansi. A policeman who fired on a crowd is killed by alleged insurgents in Mmabatho. 27 – The Assassination of The Cradock Four. July 2–6 – The African National Congress holds their second national consultative conference in Kabwe, Zambia. 20 – P.W. Botha declares a state of emergency in 36 magisterial districts. Limpet mines destroy a sub-station in Durban. A Soweto group, dubbed the Suicide Squad, attacks the homes of two Soweto policemen. A hand grenade is thrown at a bakery in Umlazi, Durban, where workers are on strike. A hand grenade is thrown at the former community councillor in Gugulethu. Two insurgents and a policeman are killed in a shootout at a police roadblock near East London. August 1 – Anti-Apartheid lawyer Victoria Mxenge is assassinated by government-backed "death squads". 2 – Two insurgents and a policeman are killed at a roadblock near Mount Ruth. 10 – Police defuses a limpet mine found on a petrol bowser at a fuel depot in East London. 15 – P.W. Botha delivers his infamous "Rubicon Speech" at the opening of the National Party Natal Congress in Durban during a policy address in which he was widely expected to announce new reforms, but instead refuses to bow to pressure for concessions to the black majority or the release of Nelson Mandela. 27 – In reaction to the Rubicon speech on 15 August, the Rand falls from 52c US to 33c US against the US dollar. 27 – Government closes the foreign exchange markets and stockmarket for a week while trying to reschedule the country's international debt, which fails. International debt is not repaid for four months. A hand grenade is thrown into the home of MP Barend Andrews. A hand grenade is thrown into the home of a Mamelodi policeman. Three limpet mines explode in department stores in Durban, causing limited damage but no injuries. A bomb