Officials said a gunman dressed in black opened fire at the school`s Barus & Holley building. A person of interest was in custody as of Sunday morning.

A gunman killed two people and injured nine others after opening fire at Brown University`s engineering and physics building in Providence, Rhode Island, on Saturday, officials said.

The unidentified gunman left after the shooting at the Barus & Holley building, on the eastern edge of the campus, Cmdr. Timothy O`Hara, deputy chief of Providence police, said Saturday night.

People in the area were advised to shelter in place amid an active manhunt, but Providence Mayor Brett Smiley announced an individual was detained in connection to the shooting early Sunday morning.

A spokesperson for Brown University Health, which operates Rhode Island Hospital, where the injured were being treated, said seven people remained in critical condition and one had been stabilized. An 11th victim was identified hours after the shooting and had non-life-threatening injuries from fragments, officials said.

`Person of interest` in custody

The attack was reported just after 4 p.m. at Brown`s Barus & Holley building, a seven-story structure home to much of the university`s engineering and physics study and research, officials said.

It happened inside a first-floor classroom, officials said. The outer doors of the building were open at the time because exams were taking place, Smiley said.

"It is unknown how he entered the building, but we do know that he exited the Hope Street side of that complex," O`Hara said.

A person of interest has been detained in connection to the shooting, city officials said Sunday morning. The individual is an adult in their thirties, but police did not release any additional details.

O`Hara previously described the gunman only as "a male dressed in black."

Providence police released security video that shows the person believed to be the shooter.

The video, only a few seconds long, shows what appears to be a man in dark, loose pants, a dark jacket and possibly also in a knit cap walking down Hope Street and rounding a corner lined by a retaining wall. It does not clearly show the man`s face, nor does it show what happened beforehand.

Shelter in place in effect

An alert on Brown`s emergency information website instructed people to lock doors, silence phones and stay safe.

A shelter-in-place advisory for the campus was still in effect Saturday night, including for any of the 11,000 enrolled students who remained at the Ivy League university, and for the Providence neighborhoods surrounding the school, Smiley said.

On Saturday afternoon, officials walked back an earlier alert stating someone was taken into custody, leaving people in the city of roughly 190,000 in fear and uncertainty.

Students hid under desks

Brown is in the middle of final exams, which began Friday, continued Saturday and were scheduled to be held through next weekend, according to the university`s academic calendar.

University President Christina H. Paxson said in a message to the school`s community that the shooting marked "a deeply tragic day for Brown, our families and our local community."

Chiang-Heng Chien, a doctoral engineering student who was working at a campus lab, said people hid under their desks as shots rang out.

"We decided to turn the lights off and close all the doors and hide under our desks," Chien told NBC affiliate WJAR of Providence.

After two hours, police moved in and told those in the lab to get out as fast as possible as they cleared the building in their search for the attacker, Chien said.

Smiley said Saturday night that he lives "about a block away" from where the violence unfolded.

He said he saw lights and sirens zooming past his house and O`Hara called him to give him an update.

"Sadly, today is a day that the city of Providence and the state of Rhode Island prayed would never come," Smiley said. "We`ve heard about horrific acts of gun violence and active shooter situations in other places, but not here."

President asks for prayers as federal agencies aid in response

Speaking after he disembarked from Marine One at the White House on Saturday night, President Donald Trump expressed sorrow.

"What a terrible thing it is, and all we can do right now is pray for the victims and for those that were very badly hurt," Trump said.

State and local agencies were responding to the shooting, as were federal resources, including FBI personnel and agents from the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives. Both FBI Director Kash Patel and Attorney General Pam Bondi also asked for prayers.

Rhode Island Gov. Dan McKee called the attack "an unthinkable tragedy."

"Our hearts are with the people of Providence and all those impacted," he said on X.