DUBLIN -- A smoke grenade used in a military training exercise sparked a 170-acre brush fire that could be seen for miles around Camp Parks on Tuesday afternoon, officials said.
The fire burned in the southeastern area of the U.S. Army Reserve Parks Reserve Forces Training Area, said U.S. Army spokeswoman Susan Clizbe.
No one was injured and no structures were damaged.
The fire started about 1:40 p.m. and was contained around 4:30 p.m.
The Camp Parks Fire Department was assisted by the Alameda County Fire Department and CalFire.
The fire burned as a red-flag warning was in place for parts of the Bay Area, hours after thousands of dry lightning strikes were reported over the ocean and portions of the South Bay on Monday evening and Tuesday morning. More lightning was expected Tuesday night.
A helicopter and aerial water tanker dropped fire retardant and water on the Dublin fire as crews in fire engines and a bulldozer worked the fire from the ground.