LOS ANGELES — Carrie Fisher, beloved by legions of fans for nearly 40 years since she first walked the corridors of a "Star Wars" spacecraft as Princess Leia Organa, is being treated in an intensive care unit after a serious medical emergency on a flight, according to her brother.



Todd Fisher told The Associated Press on Friday night that his sister was receiving excellent care, but said that he could not classify her condition. He had earlier told the AP that she had been stabilized and was out of the emergency room.



In a subsequent interview he said many details about her condition or what caused the medical emergency are unknown, and much of what had been reported was speculation.



"We have to wait and be patient," he said. "We have so little information ourselves."



Carrie Fisher, 60, experienced medical trouble during a flight from London and was treated by paramedics immediately after the plane landed in Los Angeles, according to reports citing unnamed sources.



Celebrity website TMZ, which first reported the incident, said anonymous sources told them the actress suffered a heart attack.



Fisher's publicists and representatives for her mother, Debbie Reynolds, and her daughter, Billie Lourd, did not immediately return calls from the AP.



Los Angeles Fire Department spokesman Erik Scott said paramedics administered advanced life-saving care to a patient at Los Angeles International Airport on Friday and transported the person to a nearby hospital. He did not identify the patient.



A large gathering of reporters was camped outside Ronald Reagan UCLA Medical Center in Los Angeles hospital, where TMZ and the Los Angeles Times reported she had been taken.