Crews were called to Cimarron Park Apartments in the 2200 block of Montgomery Park Boulevard just before 3am.
Police first arrived on scene and helped residents escape to safety. They found a 67-year-old woman who was inside the unit that was on fire, and they pulled her out through a window.
Firefighters extinguished the blaze after about an hour, but the 67-year-old resident died at the scene.
No other injuries were reported.
The cause of the fire is under investigation. Officials are looking into whether an oxygen tank explosion may have sparked the blaze.
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