The story

Sen. Edward Kennedy will spend the night in a Washington hospital after suffering a seizure Tuesday afternoon during a luncheon for President Barack Obama.

Doctors believe the incident was brought on by "simple fatigue," said Dr. Edward Aulisi, chairman of the neurosurgery department at Washington Hospital Center.

"Sen. Kennedy is awake, talking with family and friends, and feeling well. He will remain at the Washington Hospital Center overnight for observation, and will be released in the morning," Aulisi said in a statement. Read full article »

CNN's Dana Bash, Evan Glass, Jeanne Merserve and Deirdre Walsh contributed to this report.

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