T. Rowe Price Group Inc. said its Baltimore headquarters on will stay closed Tuesday because of the riots. Legg Mason Inc., also based in Baltimore, is encouraging employees to work from home, spokeswoman Mary Athridge said by phone.

The violence began when high school students gathered at the city’s Mondawmin Mall and began throwing concrete blocks and rocks at officers, Baltimore police Commissioner Anthony Batts said. Television images showed looting at a check-cashing business and the destruction of a police vehicle in the city, which is about 65 kilometers (40 miles) northeast of Washington.

Gang Threat

Authorities had indications that gangs decided at a meeting on Sunday they would attempt to kill officers after Gray’s funeral, Batts said.

“They said at the conclusion of Mr. Gray’s funeral today each group was intending to kill and take out a police officer,” he told reporters.

Gray’s sister, Fredericka Gray, condemned the rioting.

“I don’t agree with the violence that they’re doing to the city -- it’s too much,” she told reporters. “I don’t think that’s for Freddie. I think they’re doing violence for something else.”

Baltimore public schools are closed on Tuesday, the first day of a citywide curfew that requires residents to remain home between 10 p.m. and 5 a.m. Baltimore Mayor Stephanie Rawlings- Blake said the restrictions would last for at least a week, and that juveniles were already subject to a curfew.

Obama Briefed

Monday night’s Major League Baseball game between the Chicago White Sox and Baltimore Orioles was postponed by the team. Oriole Park at Camden Yards is about 2 miles from a CVS store that was looted and then set ablaze. Police said rioters cut a hose that was being used to fight the fire.

“Too many people have spent generations building up this city for it to be destroyed by thugs who in a very senseless way are trying to tear down what so many have fought for,” Rawlings-Blake said.

President Barack Obama was briefed Monday on the situation in Baltimore by Attorney General Loretta Lynch, who said the Justice Department is poised to provide any needed assistance to local authorities, according to a White House statement. Obama also spoke with Hogan and Rawlings-Blake about the city’s efforts to maintain order.

Police Tensions

The Justice Department has opened a preliminary civil- rights inquiry into Gray’s death, as the Obama administration scrutinizes law-enforcement practices nationwide.

Last month, the Justice Department criticized the civil- rights record of police in Ferguson after the fatal shooting of an unarmed black teenager by an officer in the St. Louis suburb.

Michael Brown’s shooting on Aug. 9 and several other incidents around the U.S., including the death of an unarmed black man who was placed in a chokehold by a white New York City police officer, sparked widespread protests.

Six Baltimore police officers have been suspended as authorities investigate the circumstances of Gray’s arrest and whether criminal charges are warranted.

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