Iranian state television reported a first and then a second explosion during an anniversary event at the cemetery where Soleimani is buried in the southeastern city of Kerman.
"The blasts were caused by terrorist attacks," state media quoted a local official in the Kerman province as saying. Babak Yektaparast, a spokesperson for Iran's emergency services, was reported later as saying 73 people had been killed and 170 injured.
The semi-official Nournews had said earlier that "several gas canisters exploded on the road leading to the cemetery".
State TV showed Red Crescent rescuers attending to wounded people at the ceremony, where hundreds of Iranians ha