TORONTO -

A woman who allegedly failed to tell a sexual partner she's HIV positive is under arrest, and Toronto police fear there may be more victims.

The force alleges the woman had sex with a man last Christmas Eve without telling him she has HIV -- the virus that causes AIDS.

Priscilla Hogan was arrested today as part of a sexual assault investigation.

Police describe the 38-year-old woman as white, 4 foot 11, and 160 pounds with blond or light-brown hair.

She has a tattoo of a gun and flag on her left arm and may also go by the name Priscilla Mambassi or Priscilla Mampassi.

Police are asking any potential victims to come forward.