The first explosion was 700 meters away from Soleimani’s grave, and the second was a kilometer (0.6 miles) away as pilgrims visited the site, IRNA added.
Soleimani was killed by a US airstrike ordered by former President Donald Trump at Baghdad International Airport four years ago Wednesday.
IRNA cited the Deputy Governor for Political and Security saying it’s unclear if the “incident was caused by a gas explosion or a terrorist attack.”
Videos posted on Iranian state media showed large crowds running in the area after the explosion.
Formerly one of Iran’s most powerful men, Soleimani was head of the Revolutionary Guards’ Quds Force, an elite unit that handles Iran’s overseas operations and was deemed to be a foreign terrorist organization by the US.