CONTRA COSTA COUNTY (KRON) – A grass fire spread quickly early Thursday near Castro Ranch Road and Alhambra Road, southeast of Pinole, before it was ultimately contained, the Rodeo-Hercules Fire Protection District has told KRON4.

Video obtained by KRON4 showed large flames.

The fire was first reported at 3:45 a.m. and was contained by 4:30 a.m, according to Darren Johnson, the batallion chief of the district. Seven total acres were burned, and firefighters are still working at putting out hot spots.

Eleven engines and 40 firefighters have been involved in the response.

The fire took place on the property of the East Bay Municipal Utility District; a fire line created by the district earlier this year stopped the fire from growing further.