The exhumation of an apartheid-era prisoners' "mass grave" at a farm on the KwaZulu-Natal south coast was postponed yesterday. Neither the police nor the government would say why. Earlier this week, it was announced that the "mass grave" would finally be excavated almost four months after it was discovered.But proceedings came to a halt two days after the area was scanned.The police and the National Prosecuting Authority's missing persons task team started the operation on Monday, continued on Tuesday, but did not return to the site yesterday.While vegetation at the site had been cleared and it remained cordoned off by police tape, no sign of digging was evident.KwaZulu-Natal police spokesmen Major Thulani Zwane and Colonel Jay Naicker did not respond to calls yesterday, nor did the NPA.It was earlier claimed that the site contained the bodies of petty criminals who had died while working under inhumane conditions on the farm between 1960 and 1980.KwaZulu-Natal government spokesman Thami Ngwenya said last week that premier Senzo Mchunu had written to President Jacob Zuma requesting a full investigation.Mchunu claimed a sangoma's "vision" had revealed the grave.The 1700ha farm is now owned by Illovo Sugar, which bought it in 1989.It is said that the former owner would order his workers to be sjambokked, and many died from their injuries...