8 June 1988
On 8 June 1988, Surendra Lenny Naidu, Lindiwe Mthembu, Makhosi Nyoka and Nontsikelelo Cothoza, all African National Congress (ANC) members were shot dead when their car was ambushed at Piet Retief on the eastern Transvaal (now Mpumalanga) border. They met Amos whom they believed was an ANC member at the Swaziland border between Houtkop and Piet Retief, but his real name was Lieutenant Silulame Moshe. Moshe drove them and ran away when the Security Police opened fire on a vehicle which they had been transported in across the Swaziland border into South Africa. The four anti –Apartheid activists believed they were about to come back to South Africa and continue with the struggle they had been involved in ever since their schooldays. In connection to the incident Eugene de Kock, a known as apartheid era assassin together with 14 other former security policeman appeared before the Truth and Reconciliation Commission (TRC) Amnesty committee applying amnesty for their involvement in three incidents of murder that took place in KwaZulu Natal where they killed nine ANC members in four days. 
References

Mini, A., 'Families hear details of De Dock deaths', From Independent Online, 26 July, [online], Available at www.iol.co.za [Accessed: 21 May 2014]|Harper, P.,'Lies and deceit in death of 9 activists', from Independent Online, 30 July, [online], Available at  www.iol.co.za [Accessed: 21 May 2014]