An apparent explosion has injured several people at a rally held by Zimbabwean President Emmerson Mnangagwa in the country's city of Bulawayo.
"In news just received Vice President Kembo Mohadi, Oppah Muchinguri-Kashiri the Zanu- PF chairperson and political commissar Engelbert Rugeje were injured in the explosion", Zimbabwe Broadcasting Corporation (ZBC) said.
Speaking after the blast, the 75-year-old said it happened a "few inches away from me, but it is not my time".
"President Mnangagwa has not been injured and is at Bulawayo State House".
Vice president Constantino Chiwenga's wife in hospital after the blast. People ducked and screamed as smoke billowed. The crowd in the stadium rushed for the exits.
Police spokeswoman Charity Charamba said she was still verifying the number of injured people.
Bulawayo, Zimbabwe's second-largest city, is traditionally an opposition stronghold.
Mnangagwa said on Saturday he was "used to these attempts" on his life, noting that he had been poisoned at a rally outside Bulawayo last August when still Mugabe's vice president.
The president has joked about the attempts on his life while on the campaign trail.
In November, Robert Mugabe was forced out of power after 37 years, following a peaceful military takeover supported by the vast majority of the 17 million population.
Mnangagwa had been in the city to campaign for votes ahead of nationwide elections on July 30.
An injured man is helped by others as security officers gather at the scene (Picture: EPA) Mr Mnangagwa, who was sacked as Mugabe's deputy in a ruling party feud shortly before the transition, took over with pledges to deliver free and fair elections.
Previous Zimbabwe votes were marked by allegations of violence and fraud, and Mugabe banned Western observers, accusing them of bias.