(Newberg, OR)  --  The Newberg School District is investigating an incident in which at least one student joined a Snapchat group called "Slave Trade" and posted photos of other Newberg students with derogatory comments that included racial and homophobic slurs.  The district sent a letter home to families saying it condemns the actions.  The news follows the school board's vote to ban Black Lives Matter and Pride flags from school property earlier this summer.