Cornell University staff are monitoring bridges over river gorges on the campus and checking on students after three fell to their deaths in the past month.
The head of the US college also took out an ad in the campus paper urging students: “If you learn anything at Cornell, please learn to ask for help.”
The first of the deaths has been ruled a suicide. The others, which happened last week, are being investigated.
Three other students at Cornell have killed themselves this academic year.