Jones said security staff were notified and the incident was reported to police.
While police assessed the threat, made directly to the student via social media, students were asked not leave the halls, but those with security cards were allowed in.
Jones would not say exactly what the threat was but said the man who made it knew the young woman.
"But it was not a long-term thing."
He believed the situation was an isolated incident but said the university took immediate action.
"The student feels that we've taken her concerns seriously."
It's not clear if the man who made the threats lives in Hamilton.
Jones said there were four halls of residence with about 1000 students living in them.
Hamilton Police confirmed they received a report overnight that a person had been threatened via social media.
"Inquiries established there was no threat present. Police will continue to make inquiries today regarding the incident."