Zimbabwe's President Emmerson Mnangagwa has survived an apparent bomb attack at a rally in the city of Bulawayo.
Mr Mnangagwa said an object "exploded a few inches away from me - but it is not my time".
Video footage from White City Stadium shows an explosion happening close to Mr Mnangagwa as he leaves the stage after addressing supporters.
Health Minister David Parirenyatwa said 15 people were injured, three of them seriously.
The exact number of people hurt by the blast remains unclear - and reports suggest it may be significantly higher.
The president was in Bulawayo, Zimbabwe's second city and an opposition stronghold, to campaign for his Zanu-PF party ahead of nationwide elections taking place on 30 July.
He is favourite to win the poll, but analysts say he also has enemies - both for overthrowing his former mentor, Robert Mugabe, and for being a previous enforcer of the Mugabe regime.
A spokesman for Mr Mnangagwa said that while the president was unhurt, Vice-President Kembo Mohadi suffered a leg injury. Another vice-president, Constantino Chiwenga, received bruises to his face.
Other officials, including Zanu-PF party chairwoman Oppah Muchinguri-Kashiri, were also injured, as were some crew members from state broadcaster ZBC and security personnel.
Mr Mnangagwa, 75, said he had visited the injured in hospital. He condemned the violence as senseless and pleaded for unity.
Mr Mnangagwa came to power last November after ousting Mr Mugabe.
He was evacuated from the scene soon after the blast.
The elections are the first in Zimbabwe since Mr Mugabe was forced out after 37 years in power.