Autopsy results in the death of Atlanta Hawks center Jason Collier will not be available until Monday at the earliest.

The autopsy on the 7-foot, 260-pound player has been performed but other tests are needed, the coroner said Sunday.

"Due to the weekend and the case volume of the pathologist, further testing will not begin until Monday," coroner Lauren W. McDonald III said. "It would be inappropriate to speculate on the cause of Mr. Collier's death until further examinations are completed."

The 28-year-old player died early Saturday after he had trouble breathing in his home, according to his father.

Jeff Collier told The Associated Press his son died in an ambulance on the way to the hospital and did not have any diagnosed health problems apart from his knees.