LOS ANGELES (KABC) -- A search is underway for a missing University of California, Los Angeles graduate student.Alison Wu is a student at the UCLA Fielding School of Public Health. She was last seen by her roommate on April 10.She is believed to be with a male friend. Family and friends identify him as Scott Helton.Wu's family members said she appeared to leave on her own, but they are concerned because they have not heard from her.If you have any information about Wu's whereabouts, you're asked to call police at 310-825-1491.