Story highlights The victim is identified as a 29-year-old Katherine Chappell of Rye, New York

Source says the tour operator driving the vehicle remains hospitalized

Witnesses say windows were open during the attack

Johannesburg (CNN) Witnesses to a lion attack honked their horns, trying to get the attention of those in danger as the animal approached.

That's according to a source close to the investigation, who spoke on the condition of anonymity Tuesday -- one day after a 29-year-old woman from the United States was killed on a safari outside Johannesburg.

A family member identified the victim as Katherine Chappell of Rye, New York. Jennifer Chappell declined to speak further Tuesday night.

The victim was taking pictures and likely didn't see the lion approach from the side, the source said. She was a passenger in a vehicle with a tour operator when the lion attacked.

The operator was hurt trying to fight off the animal, but he is expected to survive, according to Scott Simpson, assistant operations manager at Lion Park.

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