Zimbabwe’s President Emmerson Mnangagwa says elections will go ahead as planned on 30 July, despite what he said was an attempt on his life on Saturday.
Forty-one people were injured in the blast at a rally in the city of Bulawayo, which occurred close to Mr Mnangagwa as he was leaving the stage.
Officials said security arrangements would be reviewed.
The vote is the first since Robert Mugabe was ousted and Mr Mnangagwa has vowed they will be peaceful.
Mr Mnangagwa said Saturday’s explosion happened when an object “exploded a few inches away from me – but it is not my time”.
He said the violence was senseless and appealed for unity.
Opposition leader Nelson Chamisa also condemned the attack, saying any political violence was “totally unacceptable”.
Those hurt included two vice-presidents, the Zanu-PF party chairwoman, members of a state TV crew and security personnel.