Westbrook police are investigating a report of the gross sexual assault of a 26-year-old Westbrook woman Thursday.

According to police, the woman said she was punched, kicked and threatened with a large knife Thursday evening outside 92 Cottage Street. Westbrook Police Chief Bill Baker said she was not hospitalized.

Police stressed that they believe the assailant may have been a man the victim knew. Police have spoken to a person of interest in the case.

Police are asking that anyone who has more information about the alleged assault or was in the Cottage Street area between 7 p.m. and 8 p.m. Thursday call the Westbrook Police Detective Division at 591-8117, e-mail crimetips@westbrook.me.us or send a text message to 650-9048.