Hollywood — The pretty co-ed daughter of an actress and a novelist was stabbed at least half a dozen times before her body was found in the Hollywood Hills, authorities said Thursday.

So far, Sheriff’s officers added, there are few clues to who killed dark-haired, 17-year-old Marina Elizabeth Habe.

Sheriff’s Lieut. Norman Hamilton said after an autopsy that there were indications that more than one person was involved. But he declined to give details.

The autopsy attributed death to massive bleeding from stab wounds in neck and chest. “There was no evidence of forcible rape,” said the autopsy surgeon, Dr. Russel C. Henry.

Test were planned to try to narrow down the time of death. Henry said the stabbing weapon was a knife, and there were wounds on both front and back of the body. He declined to say how many.

The girl was also beaten on the head and body “with a small blunt object” and had two black eyes, he said.

The daughter of writer Hans Habe of Zurich, Switzerland, and actress Eloise Hardt, was found Wednesday in a ravine in the hills a few miles from where she lived with her mother. The parents are divorced.

On arrival at new York’s Kennedy airport, where he changed planes, Habe was silent and subdued. “You know more about it than I do,” he told newspaper men who questioned him. Habe said he had last seen his daughter last summer.

Deputies believe the girl was kidnapped outside her home after returning from a date. The body was 30 feet down a slope off Mulholland Drive, a scenic route winding along the rest of the hills.

Deputies said Marina returned home about 3:30 a.m. Monday after a date with John Hornburg, 22. She drove alone from his house to hers.

Her mother, whose last role was in the film Games, said she heard noises outside and saw a man standing next to her daughter’s car in the driveway. Then, she said, a black sedan came out of the driveway, the man said something like, “Let’s go,” and the car drove off. She didn’t see her daughter, the mother said.

Habe, 57, was a noted reporter before becoming a novelist. His 18 books include The Countess and The Mission.

Marina was home on Christmas vacation from the University of Hawaii.