Witnesses on Saturday described their shock after a shooting at Brown University in Providence, Rhode Island, during final exams on the Ivy League campus killed at least two people and injured nine others.

Police were still searching for the suspect.

One student who was working in a nearby lab when the incident occurred said he and his friends hid under a table after getting a notification about an active shooter on the premises.

"My friends told me that they received a notification of a shooting incident just one block away from us," student, Chiangheng Chien, told The Associated Press.

"So we decided to close all the doors and turn also the lights off and hide under the desks and wait for the next notification."

One witness, Jiv Daya, said he was out getting matcha when several police cars drove by as they responded to the shooting.

Daya said he was confused by what was going on and after speaking to students at the university found out there was an active shooter.

"It's just a very scary night and I'm praying for everyone out there and hope they are alright."

Officers scattered across the campus and into an affluent neighborhood filled with historic and stately brick homes, searching academic buildings, backyards and porches for hours after the shooting.

The suspect was a male in dark clothing who was last seen leaving the engineering building where the attack happened, said Timothy O’Hara, Deputy Chief of Police.

The shooting occurred in the Barus & Holley building, a seven-story complex that houses the School of Engineering and physics department.

According to the university’s website, the building includes more than 100 laboratories, dozens of classrooms and offices.

Engineering design exams were underway there when the shooting occurred.