Homewood police responded about 11:15 p.m. Tuesday to the 18200 block of Morgan Street near James Hart School after receiving a report of domestic battery.
The victim left the apartment before calling 911. She told officers that someone had threatened her with a firearm.
Officers were unable to make contact with the alleged offender, who had remained in the apartment.
The South Suburban Emergency Response Team (SSERT) then responded to the scene.