An off-duty Bexar County sheriff's deputy has suffered injuries in a crash that happened after she stopped to help another driver.

According to San Antonio police officers who responded to the scene around 10:30 p.m. Sunday, the deputy was on her way to work when she stopped to help a driver whose car had been rear-ended in a hit-and-run crash on Interstate 35 near Weidner Road.

The deputy had just climbed back into her own vehicle when an SUV struck her from behind, police said.

The impact sent the deputy's private vehicle flying more than 40 feet into a retaining wall, police said.

The deputy, who was temporarily trapped inside her vehicle, suffered two broken legs, according to officers at the scene.

She was taken to San Antonio Military Medical Center for treatment. San Antonio police said the driver who rear-ended her appeared to be drunk and was arrested on a charge of intoxication assault.

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