PARIS : French authorities are investigating an attack on a transgender woman who was assaulted and jeered at a demonstration in central Paris against Algerian president Abdelaziz Bouteflika that sparked outrage Wednesday among activists and politicians.

A video of the incident on Sunday, which has been viewed over 1.5 million times on Twitter, showed a group of protesters rounding on the woman as she came out of the metro onto Place de la Republique where the demonstration was taking place.

One man reaches out, ruffles her hair and taunts her in Arabic as she climbs the steps to jeers.

Dressed in a skirt and striped shirt, she seeks to move through the crowd, a mixture of expatriates and people of Algerian origin. One man throws a flurry of punches at her while another aims a kick in her direction.

A girl wearing an Algerian flag around her shoulders apparently tries to intercede before a team of metro security officials arrive on the scene and escort the woman away.

In an interview with BFM TV the woman, identified only as Julia, aged 31, said she was confronted by three individuals.

“One of the three looked at me and said ‘You’re a man, you’re going nowhere, you’re not allowed pass’ and put his hand on my chest.”

Another, she said, made an obscene gesture while two others “laughed and threw beer on me.”

It was not clear whether she was referring to the attack caught on camera or to another earlier incident.

French prosecutors have opened an investigation into “violence committed on the grounds of sexual orientation and gender identity,” a judicial source said. One person had been detained but was later released, the source added.

The number of attacks on the French transgender community shot up by 54 percent to 186 reported incidents in 2017, SOS Homophobie said in a report last year.

Paris has also been the scene of several homophobic attacks in recent months.