(Portland, OR)  --  Police are searching for a man accused of breaking into a ten-year-old girl's room and sexually assaulting her before stabbing her in the neck.  Police say the girl was sleeping in her bed at a home in Beaverton Sunday morning when the man climbed through her open first-floor window.  He then allegedly tried to kiss the girl and put a knife to her throat and cut her.  He's described as a white man in his late teens or early 20s with a slim build and dark buzzed hair.  He was wearing a white tank top and black shorts at the time of the attack.