The Harris County Sheriff's Office said Precinct 4 deputies responded to the shooting in the 23300 block of Aldine Westfield at 3:30 a.m.
At the scene, deputies found an 18-year-old man with a gunshot wound who was alert and able to speak with deputies, HCSO said.
While surveying the area, authorities said they found a second man with gunshot wounds who was pronounced dead at the scene.
According to investigators, the injured man and the man killed were involved in a physical altercation that led to a shooting.
Authorities said a third man arrived at the scene and began shooting too. Deputies said he fled the scene on foot.
Investigators said they believe the injured man and the man killed knew each other, but are unsure about their relationship to the third person. Authorities did not release the identities of the men involved in the incident.
HCSO asking that anyone with information contact the homicide unit at 713-274-9100 or Crime Stoppers 713-222-TIPS (8477)
This is a developing story. Eyewitness News is continuing to gather facts.