A staff member reportedly witnessed a man with a gun in an elevator at the Haas School of Business at about 2:15 p.m. Tuesday and reported the incident to campus police. The woman said she saw the man take a gun out of his backpack.
Police responded and located the suspect, 32-year-old Christopher Nathen Elliot Travis in a computer lab in the building. Travis allegedly raised the gun and was shot by an officer. The shooting occurred about five minutes after the suspect was reported to police.
Four students were reportedly in the lab between Travis and the officer when the officer fired.
Police evacuated the Haas building after the gunman was reported.
Travis was hospitalized in Oakland, where he died later in the day.
Travis was an undergraduate transfer student.
Tuesday's shooting marked the first on-campus shooting at Berkeley since 1992, when an Oakland police officer shot and killed an activist wielding a machete who had broken into the former chancellor's mansion.
The Associated Press contributed to this report.