A “person of interest” has been detained after a gunman opened fire on the campus of Brown University in Providence, Rhode Island, killing two students.
Nine people, all or nearly all of whom are also believed to be students, were injured in the attack at around 4pm (9pm UK time) on Saturday.
Eight people have been described as stable, although one remains critically ill. Another person has left hospital.
A video released by officials shows a suspect walking down a street away from the campus and turning a corner, dressed in dark, loose-fitting clothing.
An FBI agent confirmed the arrest took place at a Hampton Inn hotel in Coventry, about 20 miles (32km) from Providence early on Sunday.
Authorities said the suspect is in their 30s, but have declined to release any further details, although they added they are not searching for anyone else.
Providence Police Deputy Chief Tim O’Hara said the shooting happened inside a classroom on the first floor of the Barus & Holley engineering building, a seven-storey structure home to much of the university’s engineering and physics study and research.
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Brown University provost Frank Doyle confirmed that final exams were taking place in the engineering building Saturday afternoon when the gunman opened fire.
A police official told the AP news agency that the gunman fired more than 40 9mm rounds. A gun has not been recovered but officers did seize two loaded 30-round magazines.
On Sunday, Providence mayor Brett Smiley told reporters the order to shelter-in-place for nearby neighbourhoods had been lifted, but some streets remained shut as investigators work at the scene.
“The people of Providence should breathe a little easier this morning,” Mr Smiley added.
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Access to parts of the campus remained restricted on Sunday as police maintained a security perimeter around Minden Hall and nearby apartment buildings.
The site has hundreds of buildings, including lecture halls, laboratories and dorms.
Brown is a private university with roughly 7,300 undergraduate students and more than 3,000 graduate students.
Students hid under desks
Student Chiang-Heng Chien said he was working in one of the labs with three other students when they received a notification about a shooting nearby.
“We decided to turn the light off and close all the doors and hide under our desks, and wait for the next notification after the shooting,” he told reporters.
The students hid under the desks for about two hours.
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“I was hoping that no one’s getting hurt and no one’s dead,” he said.
The students left the building when they received another notification, and security personnel moved in to search the facility.
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Emma Ferraro, a chemical engineering student, was in the Barus & Holley lobby working on a final project when she heard loud popping sounds coming from the eastern side of the building.
For a moment, everyone paused and looked around, she recalled.
Once Ferraro realised the sounds were gunshots, she rushed to the door and ran to a nearby building, where she had been sheltering for the past few hours.
One person who was initially thought to be involved in the shooting was detained but was later determined to have no involvement.
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President Donald Trump told reporters at the White House that he had been briefed on the situation, which he called “terrible”.
“All we can do right now is pray for the victims and for those that were very badly hurt,” he added.
