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SAN ANTONIO -- A woman in her 50s is dead after police say she may blacked out behind the wheel of her car.

The name of the deceased was not immediately available.

The woman was traveling eastbound on I-10 when she slammed into a guardrail near Martin Luther King Drive around 4 p.m.

San Antonio police said she suffered from a medical condition, which they believe caused the woman to wreck.

She was rushed to San Antonio Military Medical Center, where she later died.

No other vehicle were involved in the accident.

Eastbound traffic was reduced to one lane for about an hour after the crash.

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