Suicides at IIT Kanpur

The recent suicides by IIT Kanpur students has left many disturbed. It is indeed suprising to see four suicides in last two years. Some of my close friends, and ofcourse husband Ruchir, are IIT Kanpur alumni, and this news has left them wondering regarding the causes. Can it be too much stress? Can it be admission of the wrong candidates into JEE? Are parents to blame? Are self expectations of students leading to this? Can the system have become such as to induce extra burden on the students? Having spent four years at IIT Delhi, I fail to understand the undergraduate stress that can prompt such actions.