An NBA championship celebration in Denver quickly turned from jubilation to terror ... as 10 people were injured in a mass shooting in the city following the Nuggets' win.
According to the Denver Police Dept. ... the shooting took place about a mile from Ball Arena at around 12:30 AM on Tuesday morning.
Full details surrounding the incident are not yet clear -- cops described the scene as "a complex" situation -- though they did say 10 total people had sustained gunshot wounds.
Cops revealed one of the injured has been identified as a suspect.