(Portland, OR)  --  Police are searching for a suspect accused of grabbing a girl and a woman in two separate incidents in Aloha.  Police say an 11-year-old girl was walking to school Friday morning when a man approached her and asked to use her cellphone before trying to grab her by the backpack.  He ran off after a woman stopped to help the girl.  Then on Sunday night, police say a woman was walking when a man grabbed her from behind.  He fled after she screamed.  The girl tells police the man was wearing a yellow bandanna over his face.