PROVIDENCE, R.I. — Brown University offered a “soft target” to the “psycho killer” who opened fire during a weekend study session, according to a criminal profiler, who cited unsecured doors, limited cameras and the fact that the gunman remained at large Monday.

The unidentified gunman barged into a lecture hall at the campus in Providence, Rhode Island, around 4 p.m. Saturday, according to authorities, killing two students and injuring nine more.

“College was a soft target — doors open and no security,” said John Kelly, a criminal profiler and the president of STALK Inc. “The killer was familiar with the area, enraged, probably at the college or engineering program. Organized. Dressed for the occasion — and very comfortable with a semiautomatic.”

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Authorities have said there were few security cameras in the Barus and Holley building, where the shooting took place.

The FBI released surveillance video showing a person of interest wearing dark clothes at an intersection to the northeast of the crime scene. He remained at large Monday afternoon, after police questioned but released someone else in connection with the incident.

“They don’t know if he’s 500 miles away or five doors down the street,” Kelly told Fox News Digital. “What they do know is he’s a psycho killer and mass shooter. If they don’t get him, there is a lot of fear for people living there, and there will be a lot of scared kids returning to campus.”

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Police and federal agents were seen canvassing a wider area, including the neighborhood surrounding the Terrence Murray Baseball Stadium about five blocks to the northeast.

Forensic investigators wearing Tyvek suits were seen combing through a dumpster outside the Barus and Holley building.

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The two victims who died were identified as Ella Cook, a 19-year-old from Alabama, and Mukhammad Aziz Umurzokov, originally from Uzbekistan but a naturalized U.S. citizen from Virginia.