Updated, 2:35 p.m. | An autopsy of the actor Heath Ledger was performed on Wednesday morning, but the results are inconclusive, according to Ellen Borakove, a spokeswoman for New York City’s chief medical examiner, Dr. Charles S. Hirsch.

Additional blood and tissue testing needs to be performed before the manner and cause of death can be determined, Ms. Borakove said in a phone interview, estimating that the process could take 10 days to two weeks. “If you have no apparent cause, you have to do further testing,” she said.

No cause of death has been ruled out, she added. The autopsy, at the medical examiner’s headquarters at 520 First Avenue, near 30th Street on the East Side of Manhattan, began around 8:30 a.m. and lasted about two hours, she said.

The two types of tests that still have to be performed include toxicology, which examines the adverse effects of chemicals in the bloodstream, and histology, in which thin slices of tissue are analyzed by pathologists.

Ms. Borakove said the body was ready to be released to Mr. Ledger’s family for burial. “We don’t need to keep the body once the family is ready,” she said.

Mr. Ledger, 28, the Australian-born actor whose breakthrough role as a gay cowboy in the 2005 movie “Brokeback Mountain” earned him a nomination for an Academy Award, was found dead on Tuesday afternoon in an apartment at 421 Broome Street, between Crosby and Lafayette Streets, in SoHo. Prescription sleeping pills were found near his body, but it is not known if the medication played a role in his death.

WCBS-TV reported today that “along with the prescription drugs that were found in the apartment, police also recovered a rolled up $20 bill with narcotic residue on it” and that police “also found several drug packets containing an unknown substance.”

Asked about the CBS news report, Paul J. Browne, the Police Department’s chief spokesman, said it was largely inaccurate.

Mr. Browne said that investigators found a “rolled-up $20 bill” in the apartment where Mr. Ledger’s body was found, but he said that the police “never said residue was found on it.”

He said the bill had not yet undergone forensic tests. “We have a rolled-up $20 bill and we never said it had residue on it or was tested,” Mr. Browne said. “It will be tested, because it was rolled up.”

Mr. Browne said no other narcotics were found in the apartment. He speculated that WCBS — in reporting that several drug packets were found — might have been confusing it with some “blister pack” of prescription drugs. He said some prescription drugs were in bottles and some in blister packs.

“There was no narcotics found in the apartment, period,” Mr. Browne said.

Mr. Browne declined to identify the name of any physicians listed on the prescription drugs.

Al Baker and John Sullivan contributed reporting.