Five people have so far been sentenced to death and 81 have received jail terms of up to 15 years in connection with unrest after Iran's disputed June election, state broadcaster IRIB reported on Tuesday.

Citing a statement by Tehran's provincial court, it said the five sentenced to death were affiliated to or members of "counter-revolutionary groups".

It was not immediately clear if the five were the same as those reported by an Iranian rights group earlier this week to have been sentenced to death.

Thousands of people were arrested after the election. Most of them have since been freed but more than 100 reformers and others have been put on trial accused of fomenting street protests. Several people have been sentenced to jail terms. The moderate opposition has denounced the trials.

"So far, verdicts have been issued on 89 of the (election-related) cases, of whom five have been given the execution sentence because of their affiliation to or membership in counter-revolutionary groups," Tuesday's court statement said, without giving any names.

Eighty-one people were sentenced to prison terms ranging from six months to 15 years. There were also three suspended jail terms. The verdicts can be appealed, it said.