An Iranian court has handed jail sentences of over 10 years each to a young couple who danced in front of one of Tehran's main landmarks.

Astiyazh Haghighi and her fiance Amir Mohammad Ahmadi, both in their early 20s, had been arrested in early November after a video went viral of them dancing romantically in front of the capital's Azadi Tower.

Haghighi did not wear a headscarf in defiance of the Islamic republic's strict rules for women, while women are also not allowed to dance in public in Iran, let alone with a man.

A revolutionary court in Tehran sentenced them each to 10 years and six months in prison, as well as bans on using the Internet and leaving Iran, the US-based Human Rights Activists News Agency (HRANA) said.

The couple, who already had a following in Tehran as popular Instagram bloggers, were convicted of "encouraging corruption and public prostitution" as well as "gathering with the intention of disrupting national security", it added.

HRANA cited sources close to their families as saying they had been deprived of lawyers during the court proceedings, while attempts to secure their release on bail have been rejected.

https://twitter.com/Tavaana/status/1620043367659995136

The group said Haghighi is now in the notorious Qarchak prison for women outside Tehran. Activists regularly condemn conditions in the facility.

Iranian authorities have clamped down severely on all forms of dissent since the death in September of Mahsa Amini, who had been arrested for allegedly violating the headscarf rules, sparked protests that have turned into a movement against the regime.

At least 14,000 people have been arrested, according to the United Nations, ranging from prominent celebrities, journalists and lawyers to ordinary people who took to the streets.

The couple's video had been hailed as a symbol of the freedoms demanded by the protest movement, with Ahmadi at one moment lifting his partner in the air as her long hair flowed behind.

One of the main icons of the Iranian capital, the gigantic and futuristic Azadi (Freedom) Tower is a place of huge sensitivity.

It opened under the rule of the last shah Mohammad Reza Pahlavi in the early 1970s when it was known as the Shahyad (In Memory of the Shah) Tower.

It was renamed after the shah was ousted in 1979 with the creation of the Islamic republic. Its architect, a member of the Bahai faith which is not recognised in today's Iran, now lives in exile.

HRANA also said that young Iranian woman Armita Abbasi, whose case has prompted international concern, went on trial on Sunday after she was arrested in October over protests in the city of Karaj outside Tehran.

In November US news outlet CNN, citing leaks and an anonymous medical source, had reported she was rushed to hospital after being raped while in custody. Iranian authorities have denied the allegations.

HRANA and Iranian media on Tuesday quoted her lawyer Shahla Oroji as saying that Abbasi had been presented with charges including propaganda against the system and the court had refused to grant bail.