Information about the disappearance of Iranian opposition leader Mir Hossein Mousavi's dead nephew's body is false, Tehran Prosecutor Abbas Jafari Dovlatabadi was quoted as saying by the Iranian Ilna news agency.
"The body is now under examination and after legal procedures we will give the body to his family," he said.
"I am surprised at how did you received this information. You should think again about your sources of information and spread the truth," Dovlatabadi added.
Mousavi's nephew Rza said his brother's dead body was stolen from the Ibn Sina Hospital, the Parliamentary Reformist's Web site parlemannews.ir reported Dec. 28.
"We are searching for the body," he said. "But no one is taking responsibility."
Dovlatabadi added that seven people died during the riots on Ashura Day.
"The clashes on Ashura in Tehran resulted in the deaths of seven people. One had been shot. Tehran police claim that the officers did not open fire. So, we are investigating the incident," he said.
According to the official, two people were killed in a shooting. The others died from being hit with heavy objects.
"The death of these persons is under investigation. I hope the culprits will be punished," he said.
Opposition supporters and police clashed on Ashura Day Dec. 27 in Tehran.
According to international news agencies, the riots resulted in the deaths of 15 people. Police arrested 550 people. According to the official information, the clashes killed eight people and 300 people arrested.