WORCESTER - More than three days after a woman's body was found near Salvation Army donation bins on Cambridge Street, exactly what happened to the victim remains a mystery, with police offering little information about the case as they continue their investigation.

The cause of the woman's death, according to preliminary autopsy results, was undetermined, police said Tuesday. Since then no new information has been made public.

Police were called to the Salvation Army, 72 Cambridge St., about 9:50 a.m. Monday and quickly called in detectives, who spent about 12 hours gathering evidence around the cluttered donation bins. The body was removed in a medical examiner's vehicle, and an autopsy was performed, with news coming Tuesday that the results were, at least preliminarily, inconclusive.

Thursday night, Worcester police spokeswoman Katie Daly said detectives have not OK'ed the release of the woman's name, age or hometown. Ms. Daly said she could not comment on whether the victim was known to police.

The area around the donation bins is fenced to prevent cars from entering, and railroad tracks run between the parking lot and Fremont Street.

Police said they had been called to the area at 72 Cambridge St. three times in the last three months for people "acting inappropriately." At about 7:10 p.m. Dec. 27 and 6:30 on Dec. 2 police, responded to calls for someone being disorderly. There was a similar call at around 10:30 p.m. Oct. 22.