A teenager in the US stumbled upon a dead body while playing Pokémon Go in her local town.

19-year-old Shayla Wiggins from Wyoming made the discovery as she was trying to get a Pokemon "from a natural water resource".

Speaking to a local news station, Wiggins said she saw something in the water underneath a bridge and went to investigate further.

"I had to take a second look and I realised it was a body," she explained.

She said the person was lying face down and was floating three feet from the shore.

"It was pretty shocking. I didn't really know what to do at first but I called 911 right away and they came really quickly."

Photo from the River where the discovery was made | Via: @KTVQ on Twitter

The local sheriff released a statement following the discovery. It indicated that the death appeared to be "accidental in nature" and there was no evidence of foul play. 

Pokémon Go requires players to search for and capture virtual Pokémon in real-world locations.

The smartphone app was launched in a handful of countries last week, but quickly topped the charts in the US, Australia, and New Zealand.

Shares in Nintendo have surged since the app release bringing the value of the company up to $23 billion. 

Police in Australia issued warnings not even 48 hours after is was released to remind people to look up from the phone while crossing roads: "That Sandshrew isn't going anywhere fast."