A student has been shot dead while playing Pokemon Go at a San Francisco tourist attraction.
Calvin Riley was shot on Saturday night at Aquatic Park, close to Ghiradelli Square, a tourist attraction filled with shops and restaurants.
A family friend told KGO-TV that the 20-year-old and a friend were playing the virtual reality game, when someone came up and shot the San Joaquin Delta College baseball player in the back and ran away.
Mr Kirby added that the pair had noticed someone watching them from the top of a hill that overlooks the park, but it was dark and they were mostly looking at their phones.
National Park Service spokesperson, Lynn Cullivan, said investigators believe there are witnesses to the attack as it happened in the busy Fisherman's Wharf area.
Sgt Robert Jansing, a detective with the US Park Police, said the gunman did not take any of Mr Riley's belongings or try to rob him.
Players have been warned about the possible dangers of the games, saying users can become engrossed in the game and tune out from their surroundings.