The University of Hartford were asking students to stay indoors or seek immediate shelter and lock doors on Thursday afternoon, according to a tweet put out by the school.
The lockdown has been lifted.
According to the school's website, Hartford Police and public safety are searching for an armed person who entered a room in the B complex, Stevens residence hall on campus.
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The school said this was an armed robbery attempt and the victim was not injured. Police believe the suspect left campus in a gold or silver Chevy headed south on Bloomfield Avenue.
The school said the man is wearing a black hoodie, black ski mask, black pants with black and red sneakers. The suspect showed a black handgun during the attempted robbery in the B complex.
Anyone with information is asked to call public safety at (860) 768-7985.