Police believe the incidents are linked and their investigation is continuing.
They are warning students, staff and faculty to avoid dimly lit areas and not to walk alone at night, among other safety tips. The man fled after the woman screamed and a fellow employee approached, police said. A UNC-CH student walking between the two buildings told police she was stopped by a male who grabbed her arm, demanded money and said he had a weapon. Then he attempted to sexually assault her before fleeing toward the Health Sciences Library, police said. He's believed to be in his early to mid-30s, has a medium complexion and was wearing dark clothing.