Gunshots rang out just a few blocks from the Thunder arena in Oklahoma City, as players and fans were celebrating their first NBA title … but police tell TMZ Sports the violent incident had nothing to do with the game!

The incident occurred at Scissortail Park in downtown Oklahoma City, about a seven-minute walk from the Paycom Center, where the Thunder defeated the Indiana Pacers in Game 7 of the NBA Finals.

While fans were celebrating the franchise’s first-ever championship in the streets nearby, one person was shot in the lower leg.

“There was one person shot a few blocks from the arena after the game, but that stemmed from a fight,” an OCPD spokesperson told us, “and was unrelated to anything involving the game.”

OCPD said the shooting victim will be okay … and reported otherwise, it was a peaceful night “for the most part.”

Video posted to social media appeared to back that … with most fans seemingly well-behaved.

Key word, most. There was one guy who climbed a light pole outside the arena.

Some fans also launched fireworks around the city.

Of course, the partyin’ isn’t over yet! Nowhere close.