East Precinct and Transit Police Division officers responded to the report of a disturbance on the platform at the 82nd Avenue MAX Station involving a possible gunshot, police said.
Officers arrived in the area and contacted witnesses who described a disturbance between two young men and that one of them fired at least one shot from a handgun.
Witnesses described the suspect with the gun as a Hispanic or Asian male, 15-17 years old, medium build, wearing a black baseball cap, a black bandana, a black and gray jacket, and a black backpack.
The suspect ran from the platform northbound on 82nd Avenue.
There were no injuries or property damage located and this case remains under investigation, police said.