The shooting happened around 12:30am in the parking lot of a Shell station on North Houston Rosslyn near Chippewa.
Someone called 911 after hearing a gunshot, officials said. When deputies arrived, they found the victim lying next to a vehicle.
According to investigators, he had been shot in the stomach. Authorities rushed him to Ben Taub General Hospital in critical condition. He underwent surgery overnight.
Deputies do not know what led to his shooting. They are questioning a witness and hoping to review surveillance cameras that may have captured the shooting.
Deputies say the suspect may be driving a blue or green Nissan Altima.
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