AZUSA (CBSLA) — A car went off the side of Highway 39 in the Angeles National Forest north of Azusa early Tuesday, sparking a small brush fire.

The crash happened at about 12:30 a.m. on Highway 39 near East Fork and sparked a fire that scorched about six acres. The blaze is about 50 percent contained.

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Before firefighters got control of the blaze, Coldbrook Campground was evacuated. Two people involved in the crash that sparked the fire were taken to a hospital.

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East Fork Road will remain closed to Crystal Lake through Wednesday.

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The cause of the crash is under investigation.