An 18-year-old woman told police on Thursday she had been raped by an acquaintance at the Lambda Chi Alpha fraternity house the night of Sept. 30.

Pullman Police Cmdr. Chris Tennant said she reported there was alcohol involved with the incident. The woman sought medical care and counseling but not a rape kit. Police have talked to the man and woman involved in the case and are investigating.

This new report follows two other rapes that were reported on Saturday of Halloween weekend. One woman decided not to investigate, while the other has sought a rape kit. Police are investigating this case as well.

Reporting by Katie Shadler

Correction: This article has been updated from its original version as seen in the Monday, November 7 edition of the paper. The alleged rape occurred on September 30.