It happened at the Momolicious food truck in Union Square around 8:35 p.m.
[Ads /]
Crews arrived at the truck near Stockton Street and Geary Boulevard and discovered three employees injured when something on their stove burst, San Francisco Fire said.
MORE: Mission Bay Fire: Crews put out blaze started in shed at food truck park Spark Social SF
Fire officials say they all had burns and were taken to the hospital.
Streets were briefly closed for the investigation, but have since reopened.
Bay City News contributed to this report
[Ads /]
If you're on the ABC7 News app, click here to watch live