*UPDATE*
The SWAT situation has been resolved. According to APD "Male suspect and second female were located in another area of the city. Female appears uninjured."
APD says they received a 911 call just before 5 of a woman being assaulted in the 6600 block of Johnny Morris Road.
They say they found the woman and treated her on scene, and she is expected to be okay.
Information they received led officers to believe another female could be involved and is possibly being held against her will in a home.
Officers also say a gun may be involved but no one has any gunshot wounds.
The neighborhood has not been evacuated but people are not being let back in. A Capital Metro bus is in the area for residents to stay warm while they wait.
APD, SWAT, EMS and Air One are all on scene.
FOX 7 has a crew on scene and will bring you any updates as they become available.