/ Modified may 23, 2015 9:14 a.m.

Brush, Grassland Fire Near Sonoita 90% Contained

Human-caused blaze burns 2,023 acres near Highway 83, but no threat to structures.

Oak Tree Fire spotlight Smoke from Oak Tree Fire (center right) drifts to east. This aerial view is from the south with State Route 83 on left side. (PHOTO: Incident Information System)

A brush and grassland fire north of Sonoita was 90 percent contained as of Saturday morning, with little chance of spreading further, a federal report said.

The Oak Tree Fire burned 2,023 acres, mostly on Coronado National Forest land, said a report on the federal Incident Information system website.

Most of the nearly 200 firefighters at the scene were being sent home, and a small cleanup crew remained.

The fire started Wednesday afternoon, sparked apparently by a vehicle fire. It spread quickly in its first 24 hours but was slowed by aerial retardant drops and ground crews.

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