Chief Justice suffers a seizure.

Chief Justice, John Roberts suffered a seizure Monday while at his summer home off the coast of Maine.

Doctors called the incident a "benign idiopathic seizure," similar to one suffered by the chief justice in 1993 after his first nomination to the D.C. circuit stalled in the Senate, the court statement said. An idiopathic seizure is one with no identifiable physiological cause.

As a result of the seizure, Roberts ,52, fell, but was conscious after the fall, which happened at his vacation home near Port Clyde, Maine, Supreme Court spokeswoman Kathy Arberg told CNN. The chief justice was taken by ambulance to a nearby hospital in Rockport, where he is expected to stay overnight, officials said.

In 1993, friends blamed the seizure on stress from the confirmation fight, and Roberts limited certain activities such as driving after it happened. But after a few weeks, the problem went away, the sources said.

President Bush was notified about Monday's incident during an Oval Office meeting, White House spokeswoman Dana Perino said.

Roberts was appointed by Bush and has served as chief justice since September 2005. He is the youngest of the court's nine justices