UCLA police alerted students around campus about two men that have been seen climbing onto balconies to peep into student residences around the fraternity and sorority row.
Campus police said the two men were in their 20s to 30s but could pass for college-aged students.
Over the past month there have been four reported peeping incidents in the same area.
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The UCLA Police Department sent out email warnings to students, urging them to shut their blinds and doors.
Campus police said all four incidents have occurred in the 10000 block of Roebling Avenue and the 500 block of Gayley Avenue.
"I'm going to keep everything closed all the time," said UCLA student Kimberly Nghieu.