“The people of Providence should breathe a little easier this morning,” Smiley added.

Brown said on Sunday that police had also lifted a shelter-in-place order for its campus in Rhode Island.

More than 400 law enforcement personnel were deployed on Saturday as police sought a suspect who had entered a building where students were taking exams with a firearm.

Access to parts of the campus remained restricted on Sunday as police maintained a security perimeter around Minden Hall and nearby apartment buildings, said Brown, which has hundreds of buildings, including lecture halls, laboratories and dorms.

Streets around the campus had been packed with emergency vehicles on Saturday while law enforcement agencies sought the gunman.

Agents from the Federal Bureau of Investigation and the Bureau of Alcohol, Tobacco, Firearms and Explosives were working with local and state police.

Officials released a video of a suspect, a male possibly in his 30s and dressed in black. Providence Deputy Police Chief Timothy O’Hara said on Saturday the individual may have worn a mask, but officials were not certain.

Investigators retrieved shell casings from the scene, O’Hara added.

The gunman fled after shooting students in a classroom in Brown’s Barus & Holley engineering building, where outer doors had been unlocked while exams were taking place, officials said.

Brown President Christina Paxson told reporters that all or nearly all of the victims were students, adding: “This is the day one hopes never happens, and it has”.

UNDER DESKS FOR HOURS

As news of the shooting spread, the school told students to shelter in place.

Brown student Chiang-Heng Chien told local TV station WJAR he was working in a lab with three other students when he saw the text about the active shooter situation a block away. They waited under desks for about two hours, he said.

Rhode Island Governor Daniel McKee vowed that the shooter would be brought to justice.

President Donald Trump told reporters at the White House on Saturday that he had been briefed on the situation, which he called “terrible.”

Compared to many countries, mass shootings in schools, workplaces, and places of worship are more common in the U.S., which has some of the most permissive gun laws in the developed world. The Gun Violence Archive, which defines mass shootings as any incident in which four or more victims have been shot, has counted 389 of them this year in the U.S., including at least six such shootings at schools.

Last year, the U.S. had more than 500 mass shootings, according to the archive.