SAN JOAQUIN COUNTY — The Corral fire that had been burning near Tracy and Livermore since Thursday has been fully contained after scorching 12,500 acres of grasslands, the Alameda County Fire Department said.

The fire was declared contained as of 6 p.m. Sunday, said spokeswoman Aisha Knowles.

No evacuations were ordered and no structures were damaged by the blaze, which began about 1:20 p.m. Thursday near the Carnegie State Vehicular Recreation Area. High initial winds the first night helped the fire more than double in size, from 4,000 acres to more than 10,000 before firefighters and air units from all over the region started getting a handle on it.

About 350 firefighters from CalFire, Alameda County, Moraga-Orinda, Tracy, Pinole, Ripon, Hayward, Livermore-Pleasanton, Fremont, San Joaquin and Stanislaus counties, East Bay Regional Parks and other fire departments responded to the fire. California Department of Corrections inmates also assisted.

One firefighter was injured over the weekend after getting stung by a bee, Knowles said. The firefighter was treated at a hospital and released.

A final damage estimate, as well as the exact cause of the fire, remain under investigation.

The blaze was first reported in an area owned by the Stanford Research Institute, near the Carnegie park and Lawrence Livermore Laboratory's Site 300. A spokeswoman for the Menlo Park-based research and development firm said it is conducting its own investigation into the cause of the fire.


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Staff writer Sophia Kazmi contributed to this story.