Police patrol at the neighbourhood of the campus of the California State University Los Angeles (CSULA) in Los Angeles, April 18, 2013. The campus of the California State University Los Angeles (CSULA) is being evacuated Thursday due to a bomb threat. The CSULA announced the evacuation around noon, through loud speakers on the campus and Twitter, as a precaution, but did not provide additional information. Most of students and staff have been evacuated. [Photo/Xinhua]