Calvin Riley was shot Saturday night by an obscure attacker at Aquatic Park close Ghiradelli Square, the U.S. Park Police said.
A family companion told KGO-TV Riley and a companion were playing the hit portable diversion when he was shot.
"From what we know there was no encounter. There was nothing said forward and backward. It was simply silly, just came up and shot in the back and fled to no end," John Kirby said.
Kirby said Riley and his companion had seen somebody watching them from the highest point of a slope that ignores the recreation center, however it was dull and they were generally taking a gander at their cellphones.
National Park Service representative Lynn Cullivan said agents accept there are observers to the assault since it happened in the clamoring Fisherman's Wharf region. They are looking for tips.
Sgt. Robert Jansing, an analyst with the U.S. Park Police, said the shooter did not take any of Riley's possessions or attempt to ransack him.
It's indistinct whether the assault had anything to do with "Pokemon Go," which has turned into a national sensation this late spring as armies of fans visit certifiable points of interest keeping in mind the end goal to discover and trap toon animals.
Be that as it may, the amusement's prominence has made unintended outcomes in regular life. Property proprietors grumble of players trespassing or harming their grounds and scores of players have been harmed or looted as they gaze at their telephones looking for advanced beasts.
Law requirement authorities have cautioned about the diversion's conceivable perils, saying players can get to be engaged in the amusement and block out to their environment.