SAN FRANCISCO (KGO) -- Police investigated a suspicious package at San Francisco State University's library.
According to the San Francisco State University Police, one person has been detained.
Police now say their investigation has concluded and they have found that the package was not a threat to public safety.
An alert to students was sent out at 3:25 p.m. and said people should avoid the area and shelter in place. The campus is located at 1600 Holloway Ave.
As of 4 pm, police have lifted the shelter in place for all other parts of campus. Authorities say the Library will resume normal activities on Tuesday.