Phoenix police are asking for help from the public as they investigate a violent sexual assault that happened several weeks ago.

The incident occurred at around 4 a.m. on Aug. 14, when police received reports of yelling near 44th and Oak streets in Phoenix.

Arriving on the scene, police discovered a trail of blood that led to a partially unclothed, unconscious woman, Lt. Casey Tornberg told reporters at a Sept. 5 news conference.

The woman suffered severe injuries, police said, and she was taken to a hospital. She has since been released, but she is still recovering.

Tornberg described the victim as a white woman in her mid-30s.

Police are investigating the case as a violent sexual assault.

Detectives found several items of evidence near the crime scene, but they haven’t identified a suspect.

Investigators said the victim lived in the area of the attack. The attack “appears random,” Tornberg said, and police are investigating it as an isolated incident.

Police said information is still limited. They are asking members of the public to contact them with information that may be relevant to the case or to call the anonymous tip line Silent Witness at 480-WITNESS (480-948-6377) or 480-TESTIGO (480-837-8446).

This article originally appeared on Arizona Republic: Phoenix police looking for tips on violent sexual assault case