(Bethany, OR)  --  Police in Washington County are warning parents after a man allegedly tried to abduct a child near school.  It happened around 5:20 yesterday evening near the Jacob Wismer Elementary and Stoller Middle school complex.  Police say the boy was walking home from the elementary school when a man approached him and claimed to be a friend of his mother's.  The man then told the boy he'd been sent to pick him up.  Police say the boy ran away and got home safely.  The suspect is described as a large man in his 70s with a three-inch white beard, Pit Viper-style sunglasses and an American flag hat.