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."

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

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.

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.