SAN FRANCISCO (KRON) — Eight people attending a Quinceanera had to be treated by for an unknown substance in San Francisco, Saturday evening.

According to San Francisco Fire Department, crews were dispatched to the Women’s Building in the Mission District of San Francisco around 10:30 p.m..

Fire crews are asking the public to avoid the area, and the San Francisco police are at the scene.

According to fire crews, the incident does not appear to be a Hazmat situation.

This is a developing story stay with KRON4 News with the latest details on this story.