Seven acres of grassy hills burned in Pittsburg Monday before forward progress was stopped on the two-alarm, early-season fire, fire officials said.
Contra Costa County Fire Protection District crews were at the scene south of W. Leland and Golf Club roads and had reached 50 percent containment by 11:48 a.m., according to a statement issued on social media accounts.
In an update provided about 20 minutes later, fire officials said forward progress had been stopped. Con Fire and Cal Fire crews were still working to reach full containment.
Officials said there were no structures threatened or injuries reported.
The cause of the brush fire is under investigation.