(Portland, OR)  --  Portland-area law enforcement agencies are urging players of the popular Pokemon Go game to exercise caution and vigilance.  The warning comes after a Forest Grove man was stabbed earlier this week by a stranger while playing the game.  Two brothers found a loaded gun yesterday while playing Pokemon Go in a field in Hazel Dell.  The warnings have been issued by the Washington Department of Transportation, the Washington County Sheriff's Office, and the Clackamas County Sheriff's Office.