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TEHRAN, June 15 (Reuters) - Iranian state television said shots were fired during a mass rally in support of defeated presidential candidate Mirhossein Mousavi in Tehran on Monday and that people were running away.

"There has been sporadic shooting out there ... I can see people running here," a reporter of Iran's English-language Press TV said in a live call from Tehran's Azadi Square.

"A number of people who are armed, I don't know exactly who they are, but they have started to fire on people causing havoc in Azadi Square," he said.

Many tens of thousands of people had gathered in the square and a nearby thoroughfare to show support for Mousavi's call for the election to be cancelled. (Reporting by Dominic Evans and Fredrik Dahl; Editing by Jon Hemming)

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