(Portland, OR)  --  Governor Kate Brown is responding to allegations that police used violence against journalists during protests in Portland on Saturday.  Videos posted on social media show officers using force against people identifying themselves as journalists.  One video shows an officer knocking a photographer to the ground.  Governor Brown issued a series of Tweets yesterday saying she will call for an investigation.  Brown says she takes "the use of physical force by law enforcement officers seriously, whether it involves members of the public or the media."