Contra Costa Fire Department firefighters responded to a fire in Clayton Sunday afternoon.
The Kirker Fire began burning as a consequence of a vehicle fire at around 1:20 p.m. off Kirker Pass Road and Nortonville Road.
Crews stopped forward progress and the fire has been contained at 50%.
Firefighters are expected to remain on scene for at least three hours.
Officials say the fire has the potential to burn over 50 acres.
This is a developing story. Please check back for updates.