Zimbabwe's First Lady Grace Mugabe has warned of a possible coup plot amid growing tensions in the fight to succeed her husband.
She says allies of Vice-President Emmerson Mnangagwa are threatening the lives of those who don't support him to replace President Robert Mugabe, 93.
Mrs Mugabe herself and Mr Mnangagwa are the front-runners and their rivalry has split the governing Zanu-PF.
The row comes after Mr Mnangagwa claimed that he was poisoned in August.
His supporters have suggested that rivals within Zanu-PF were responsible, although Mr Mnangagwa has distanced himself from such claims.
He has told state media that he remains loyal to President Mugabe.
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An angry Grace Mugabe departed from a prepared speech at an event in Harare to attack Mr Mnangagwa.
"We are being threatened night and day that if a particular person does not become president we will be killed," she said.
"We will not bow to that pressure. They say there will be a coup, but no-one will recognise you. The African Union will not recognise you, the SADC [Southern African Development Community] will not."
Mr Mnangagwa fell ill at a political rally led by President Mugabe in August and had to be airlifted to South Africa for treatment.
His supporters suggested a rival group within Zanu-PF had poisoned him and appeared to blame ice cream from Mrs Mugabe's dairy firm.
But on Thursday, Mrs Mugabe dismissed the suggestions.
She said: "Why would my dairy business prepare a single poisoned ice cream cup just for him? Why would I want to kill him? I am the wife of the president. Who is Mnangagwa, who is he? What do I want from him?"
Addressing reporters earlier, Mr Mnangagwa said that while doctors had confirmed that he was poisoned, it was "false and malicious" to suggest that it was at the hands of the first lady.
