Correct. That raid had the Rhodesian Selous Scouts drive captured Frelimo vehicles into the camp wearing Frelimo uniforms when the entire camp was on parade in the morning in uniform. Confusion reigned and the ZANLA cadres surrounded the vehicles cheering their military supporters.
The trap was sprung when one ZANLA cadre in the front of the mass around the vehicles saw blue eyes staring at him from a blackened face behind a vehicle mounted machine gun. The shock on his face turned it grey and he tried to run into the swarming crowd shouting "Mlungu! Mlungu!"
To no avail. The entire column opened fire at the same time killing many instantly. many drowned trying to cross the river to escape.
The communist propagandists of the time had press releases stating women and children refugees and hospital patients were killed. Only those that have no idea of the observation of the camp for months by the SAS to determine it's true nature will believe that.
The true accounts of the Nyadzonya raid can be found in these two books which will not be found on a cadres bedside table:
Hamas uses the same propaganda the communists did during the Rhodesian war.