The woman was reportedly found outside the restaurant in the 8600 block of Westheimer Road near Fondren after a manager said they heard gunshots and ran to see what happened.
The manager said when they got outside, the woman was lying on the ground. Around 9:40 p.m., the manager called Houston police, and officers arrived on the scene within minutes.
Authorities then performed CPR before transporting the woman to the hospital. She later died.
A person of interest has been determined and investigators are reviewing additional surveillance video, according to HPD assistant Chief Darren Edwards.