The Houston Police Department said officers were called out to Reveille Park on Oak Vista Street at about 11:30 p.m. on Thursday and found the two victims shot.
Police said they were both taken to the hospital, where the 17-year-old died.
"The details on what transpired at this event are unknown at this time. We do know that some sort of a meet-up occurred between these parties and a shooting took place," HPD Lt. A. Ali said.
The lieutenant said someone was being questioned in connection with the shooting, but so far, no arrests have been made.
HPD said two firearms were recovered from the scene, but investigators are still working to learn what led up to the shooting.