CLAREMONT (CBSLA.com) — A brush fire grew to 17 acres Wednesday afternoon in Claremont.

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Los Angeles County fire crews arrived near Foothill Boulevard and Dartmouth Avenue around 3:30 p.m. to find the blaze burning heavily in vegetation.

The fire went to a second alarm, which prompted additional crews to join the effort.

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Some homes were initially threatened on Mills Avenue, but firefighters were able to gain the upper hand.

Super Scooper aircraft were on the scene, along with three water-dropping helicopters.

There have been no reports of any injuries.

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The cause of the fire is under investigation.