Zimbabwean President Emmerson Mnangagwa survived a blast at a ruling ZANU-PF party rally, his spokesman said, adding that he had been taken to safety after the incident.
Zimbabwe's President Emmerson Mnangagwa said on Saturday an explosion at a stadium where he was addressing a political rally was a "cowardly act" that would not prevent the country from holding free and peaceful elections next month.
"The campaign so far has been conducted in a free and peaceful environment, and we will not allow this cowardly act to get in our way as we move towards elections," Mnangagwa said in a Facebook post.
He later said in a television interview that the blast had happened a few inches away from him as he left the stage.
State media called the incident an assassination attempt. Witnesses said several people appeared to be injured, including a vice president.
President Mnangagwa was whisked to a state house in Bulawayo, where he had been speaking ahead of next month's historic election, the first since longtime leader Robert Mugabe stepped down.
"Attempt on ED's life," the state-run Zimbabwe Herald's headline said, referring to the president by his initials.
The blast occurred as Mnangagwa had just finished addressing the crowd and was leaving the podium.
Footage posted online showed the president waving to the crowd, turning to step off the podium and walking into the open-sided VIP tent, where seconds later the explosion occurred. People ducked and screamed and smoke billowed.
#Zimbabwe 🇿🇼: this video from the attack in #Bulawayo is crazy!— Thomas van Linge (@ThomasVLinge) June 23, 2018
Moments after #Mnangagwa leaves the stage, the bomb goes off right behind him, the vice-president is reported to be injured in the explosion. pic.twitter.com/jcDqO8EDGq
State television immediately cut its broadcast. The broadcaster, ZBC, later reported that Vice President Kembo Mohadi was injured in the leg and taken to a local hospital.
Bulawayo, Zimbabwe's second-largest city, is traditionally an opposition stronghold.
The explosion came just hours after a similar attack in Ethiopia, where a blast killed at least one person and injured scores just after the new prime minister addressed a huge rally in the capital.
Presidential spokesman George Charamba told The Zimbabwe Herald that investigations were underway, and pointed out that there have been "multiple attempts" on Mnangagwa's life over the years.
The president himself has openly joked about the attempts, including during his campaigning.
Mnangagwa took power in November after former ally Mugabe stepped down under military pressure. That dramatic transfer of power began when Mnangagwa was fired as Mugabe's deputy and said he had to immediately flee the country for his life.
The July 30 election will be the first without Mugabe in the southern African nation since independence in 1980. Mnangagwa has pledged to hold a free and fair election, inviting Western observers for the first time in almost two decades.
Past votes have been marked by allegations of violence and fraud, and the United States and others have said a credible vote is key to lifting international sanctions.