CHICAGO (CBS) — A man was stabbed in the neck Monday night in the South Austin neighborhood, and police say his girlfriend was the assailant.

The man, of an unidentified age, was stabbed in the neck by his girlfriend in the 1100 block of North LeClaire Avenue at 9:30 p.m., police News Affairs Officer Amina Greer said early Tuesday.

READ MORE: Man's Body Pulled From Lake Michigan In Evanston, Hours After Crews Rescuing 3 Other People Find His Belongings On Beach

The victim was taken in an unidentified condition to West Suburban Medical Center in Oak Park.

READ MORE: Chicago Weather: Last Weekend Of Summer May Be Among Nicest

No one is in custody and the motive behind the stabbing is not known.

MORE NEWS: At Least 5 People Killed, 20 Wounded So Far In Chicago Weekend Gun Violence; 3-Year-Old Boy Among Survivors

The Sun-Times Media Wire contributed to this report.