SOUTHLAND : Tests Run to Find Out What Ails Hospitalized Michael Jackson

Doctors today ran a battery of tests to find out what ails pop star Michael Jackson who was hospitalized late Sunday with chest pains after several days of illness.

“He’s undergoing several important tests today,” said Jackson spokesman Bob Jones. “I don’t think it was a heart attack. He just experienced some discomfort. He had been feeling bad the past two or three days.”

Jackson, 31, was rehearsing dance steps, which he uses as a form of exercise, at his Encino home when he began experiencing the chest pains Sunday night, Jones, said.

Jackson was taken to the emergency room at St. John’s Hospital and Health Center in Santa Monica about 9 p.m. Sunday.

Jackson was staying in the same hospital as his friend Elizabeth Taylor, who has been recovering from a near-fatal bout of pneumonia and complications for nearly two months.