WATCH: Mnangagwa threatens Mugabe

Tension is mounting in Zimbabwe as governing party, ZANU PF fights for its survival. According to reports workers at former President Robert Mugabe's residence were taken in for questioning this morning.

Former First Lady Grace Mugabe is apparently anxious and not sure whether to remain at the house. Her husband and former president, Robert Mugabe, arrived on a private visit to South Africa today. It is not clear if he is still in the country tonight. The party's youth wing today displayed displeasure with former President Robert Mugabe who has publicly said he believes the change of government was a coup - an indication that he is still aggrieved by the events that saw him ousted after 38 years.