A man, who the University of Hawaii at Manoa said was distraught and possibly armed, was found in the Diamond Head area Friday afternoon.
At noon, UH-Manoa sent out an official emergency notification warning students and faculty about the man.
The emergency was posted on the university's Facebook page at noon and students said they received text messages about it.
Honolulu police and UH-Manoa Campus Security investigated the report.
People were asked to stay away from Manoa Stream behind the East-West Center, Waahila Faculty Housing and the School of Hawaiian Knowledge.
A Department of Education spokesperson said Hokulani Elementary was on lockdown until the end of the school day.
Hanahauoli School was on lockdown at around 1 p.m. as a precautionary measure.
At 12:30 p.m., the man was spotted near the Hawaiian Studies loi, or taro patch, on Dole Street and people were asked to stay away from that area.
At 2:30 p.m., the man was found in the Diamond Head area by police and taken to a hospital for observation. No weapon was found on the man, according to police.
UH-Manoa was given the "all clear" shortly after the man was found. UH is offering crisis counseling at 956-7927.