CONTRA COSTA COUNTY, Calif. (KRON) — Crews responded to a three-alarm brush fire in Martinez, the Contra Costa County Fire Protection District announced on Twitter. The fire, which is contained as of 6:20 p.m., is in the area of 4105 Pacheco Blvd.

The fire is approximately 17 acres, according to Contra Costa Fire. Investigators believe the fire began in or near a homeless encampment. Officials are calling this the Pacheco Fire.

The public is asked to avoid the area to allow firefighters access to respond to the fire. Cal Fire SCU tweeted it will be assisting Contra Costa Fire in its response. The location of the fire is near Las Juntas Elementary School.

Air support is being provided by Cal Fire and CCSO. There are no evacuations at this time, according to a tweet from Contra Costa County Fire.

This is a developing story. Check back for updates.