Iran has announced the first execution of a protester convicted over the recent anti-government unrest.

Mohsen Shekari was hanged on Thursday morning after being found guilty by a Revolutionary Court of "enmity against God", state media reported.

He was accused of being a "rioter" who blocked a main road in Tehran in September and wounded a member of a paramilitary force with a machete.

An activist said he was convicted after a "show trial without any due process".

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