Sitting by a window overlooking Centennial Olympic Park, U.S. swimmer Janet Evans shrieked when a pipe bomb exploded early today during a free concert, killing one and injuring more than 100 people.

Evans was talking to a German television reporter when the bomb went off. Footage showed her letting out a startled cry at the sound of the blast, which killed one woman; a cameraman hurrying to cover the story also died of a heart attack."I live in California and I'm used to earthquakes, so at first I thought it was an earthquake when I heard glass shattering," Evans said on NBC's "Today" show.

"I don't even know how to deal with it right now to be honest with you," Evans said. "It has been a lot of highs and a lot of lows and this is a way, way low.

"I'm very sad for all the athletes and all the people at the Olympics that something like this put a shadow on this kind of games," she said.

Evans, a four-time Olympic gold medal winner, failed to win a fifth this year in Atlanta and tie with speed skater Bonnie Blair for the most gold medals by a woman athlete.

Evans said athletes had talked about Olympic security, but she thought things were running smoothly.

"Once we got into the village and security, we felt good," she said. "I think everyone was doing a really good job keeping us safe."