Kennedy suffered a seizure at his home in Hyannisport, Mass., Saturday. Doctors Sunday said he did not suffer a stroke and was "resting comfortably" at a Boston hospital, CNN said.

Dr. David Thaler with the stroke center at Tufts Medical Center in Boston said seizures rarely cause damage to the brain, but could point to other health problems like blood clots in the brain or brain tumors.

"People should be reassured because seizures don't hurt the brain," Thaler told The Boston Globe.

Kennedy is scheduled for a variety of tests during the next two days to determine the cause of the seizure. He is likely to undergo an electroencephalography to examine brain wave function and other medical imaging procedures to look for possible brain tumors or other abnormalities, the Globe said.

Thaler said people can suffer seizures from a variety of minor disruptions, including low blood sugar, sleep deprivation or alcohol intoxication.

There was no official information from Kennedy's office Sunday regarding any planned or concluded medical procedures.