The elite Pasadena science school has only had a handful of student suicides in the past decades, but there have been two suicides in just the last two months.
Caltech senior Jackson Wang, a mechanical engineering major from Hong Kong, was found dead in his dorm room earlier this month. Three weeks prior to Wang's death, junior Brian Go, a computer science and math major from Maryland, killed himself on campus.
Both students asphyxiated after inhaling helium, but authorities say the deaths don't appear to be linked.
The Associated Press contributed to this report.