A 20-year-old man was shot to death while playing "Pokemon Go" at a tourist attraction along San Francisco's waterfront, authorities and a family friend said on Sunday. A family friend told KGO-TV Riley and a friend were playing the hit mobile game when he was shot. Calvin Riley was shot Saturday night by an unknown assailant at Aquatic Park near Ghiradelli Square, the U.S. Park Police said. Law enforcement officials have warned about the game's possible dangers, saying players can become engrossed in the game and tune out to their surroundings. It was just senseless, just came up and shot in the back and ran away for nothing," John Kirby said.

Source: ABC News August 08, 2016 01:00 UTC