MERCED, Calif. (KFSN) -- The California Highway Patrol says 16 teenagers were on a bus that overturned on the Highway 99 off-ramp in Merced.
Officers responded to a call of an overturned bus on the Martin Luther King Jr. Way off-ramp at about 2 p.m. Saturday.
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Officials say everyone on board was on their way to a quinceañera.
Some on the bus were taken to the hospital and treated for injuries. All are expected to make a full recovery.
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Investigators say the adult driver claims there was a mechanical failure that caused the incident.
No drugs or alcohol are factors in the crash.