CNN:

Sen. Edward Kennedy was rushed to Cape Cod Hospital in Massachusetts Saturday morning, a well-informed, prominent Democratic source in that state told CNN.

The source said the 76-year-old senator had "symptoms of a stroke."

Kennedy was taken to the hospital around 8 or 9 a.m. from the Kennedy family compound in Hyannis, according to the source. The source said the senator would be transferred to Massachusetts General Hospital in Boston.

That hospital said it had no information on Kennedy.

Kennedy has represented Massachusetts in the Senate since 1962. He is one of only six senators in U.S. history to serve more than 40 years. He is known as a liberal champion of social issues such as health care, family leave, and the minimum wage. Read on...

Please send your prayers and thoughts to Senator Kennedy and his family. We'll bring you more updates as they become available.

UPDATE: It now appears that doctors believe Senator Kennedy had a seizure, not a stroke as was previously suspected.