Scroll to the bottom for updates A 2-alarm fire broke out around 11:40pm tonight in the rear of a building near 629 Haight Street, between Steiner and Pierce.

The cause of the fire, which has since been contained, is unknown at this time. A CBS news producer reports that 6 people were displaced, and firefighters mentioned that at least 5 adults required medical assistance, though we don't have any word on their conditions. We also don't know the status of any pets that may have been in the building. One woman we spoke with who fled from an adjacent unit expressed concern for her Siamese cats, who she believes may have still been inside. Here are some of our photos from the scene, as well as some submitted by readers and folks around the internet.

@haighteration from Haight btw pierce n Steiner.Looks like it started on Waller. twitter.com/BGMSF/status/3…

— Michael Coughlin (@BGMSF) February 24, 2013

(YouTube/mflux) We'll update with more details as we get them. Update 2/24/13, 11am: SFPD spokesman Albie Esparza tells us that 3 apartments were affected by the fire, and about 8 people displaced. Officer Esparza adds that no injuries were reported. The cause of the fire is under investigation.