ADDIS ABABA, Ethiopia — Ethiopia’s health minister, Amir Aman, said Sunday that a second person has died after an explosion the day before at a massive rally in the capital for the new prime minister.

Aman said the person died at a hospital in intensive care. More than 150 people were injured in the blast.

State broadcaster ETV reported that more than 30 people have been arrested, including the deputy head of Addis Ababa’s police commission.

Witnesses said a man in the crowd tried to throw a grenade at Prime Minister Abiy Ahmed but was restrained by people around him.

Tens of thousands had gathered to cheer a wave of reforms under the young leader, who took office in April. The ruling party has blamed ‘‘desperate antipeace elements’’ for the attack.

In Zimbabwe on Sunday, officials said the explosion at a campaign rally for the country’s president that injured 49 people will not delay next month’s historic election.

Vice President Constantino Chiwenga called the attack terrorism­ and said any frightened candidate would be provided with protection.

Associated Press