Fireworks may have sparked 10-acre brush fire in the east San Jose foothills

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Investigators think fireworks may have sparked a 10-acre brush fire early Thursday morning in the East San Jose foothills.

They are calling the blaze, suspicious.

A bystander spotted the flames along Sierra Road, and called 911 at around 2:30 a.m.

The fire jumped the road, and was burning on both sides.

Officials were worried the blaze would head toward Alum Rock Park.

About seventy firefighters from Cal Fire and the San Jose Fire Department were brought in to put the fire out.

Equipment, including bulldozers and water tenders, were also brought to the fire zone, because there were no hydrants in the area.

It took about an hour for crews to bring the fire under control.

Authorities said the fire would have been much bigger, if it happened during the day, due to hotter temperatures and more wind.