DUNKARD TOWNSHIP, Pa. -- There is still no sign of a Greene County 12-year-old girl who went missing on her all-terrain vehicle.

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SLIDESHOW: Photos From Search

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Overnight, a search by air and on the ground was scaled back.

Thursday morning, the search began again for Gabrielle Bechen.

She has been missing from her home in Dunkard Township since early Tuesday morning.

Bechen's parents called police when the girl did not return from riding her ATV.

Rescue workers from neighboring West Virginia, Maryland, Virginia and Delaware have joined in the search.

Police are searching a three-mile area bordering West Virginia on foot, with dogs, ATVs and a helicopter.

Bechen's parents said Gabrielle was riding a small black ATV with flame decals on its fenders.