Iranian law prohibits women from singing solo before mixed audiences that include men and mandates adherence to strict hijab regulations.
Although the restrictions are longstanding, a surge of recent such performances have challenged legal and cultural boundaries.
According to music journalist Bahman Babazadeh, the concert had received official authorization. However, during the performance, security forces—accompanied by four female officers—entered the venue and took Seyfizadeh into custody.
Authorities have not given an official reason for the arrest, but an eyewitness, speaking to Iran International on condition of anonymity, confirmed that men were present at the event.
The eyewitness also noted that organizers had prohibited the audience from recording the concert.
Shortly after the incident, Emarat Rooberoo, the venue where the concert was held, announced via Instagram that it would remain closed until further notice.