(CNN) - Sen. Edward Kennedy was hospitalized in Boston, Massachusetts, after suffering an apparent seizure Saturday morning, his family said.
"He is undergoing a battery of tests at Massachusetts General Hospital to determine the cause of the seizure. Sen. Kennedy is resting comfortably, and it is unlikely we will know anything more for the next 48 hours," a statement from his office said.
Senate Majority Leader Harry Reid said Saturday he spoke to the wife of the Massachussetts Democrat, Vicki, and that she told him that her husband is going to be fine.
"Everyone knows he is a strong fighter," Reid said, speaking at the Nevada state Democratic Party convention.
Kennedy was transferred to Massachusetts General Hospital in Boston for evaluation after initial treatment at Cape Cod Hospital, an earlier statement from his office said.
The senator spent less than an hour in the Cape Cod facility, hospital spokesman David Reilly said.
Earlier, a well-informed Democratic source in Massachusetts said the 76-year-old senator had "symptoms of a stroke" at the Kennedy family compound in Hyannis Port.