BERKELEY — After sending out an alert late Wednesday morning regarding a report of a “subject with a gun” on campus, UC Berkeley police said the person was a private, armed security guard “with legitimate business on campus.”

The first alert was sent at 11:50 a.m. and warned the Cal community to avoid the area around the Martin Luther King Jr. and Cesar Chavez buildings. At 12:18 p.m., Cal police said the situation was “all clear.”