Photo by Samuel Corum/Anadolu Agency/Getty Images(BALTIMORE) -- Maryland Gov. Larry Hogan declared a state of emergency Monday following a violent gathering in Baltimore, where people threw objects at police, set cars on fire and looted businesses. Hogan also activated the National Guard.
Multiple police officers were injured in the violent protests after the funeral of Freddie Gray, who died of a spinal injury while in police custody earlier this month.
Police said a group of protesters were throwing bricks in the direction of officers near the Mondawmin Mall. A police presence in the area had been building throughout the afternoon Monday.
Maryland Governor Larry Hogan also activated the National Guard.
"These acts of violence and destruction ... cannot and will not be tolerated," Hogan said at a news conference Monday evening. Hogan called the clashes "disturbing" and referred to the protesters as "thugs."
Protesters were also seen climbing on a police cruiser and damaging several others. Police tweeted that people were also looting businesses and setting cars on fire.
One of the looted businesses was a CVS Pharmacy, but a spokesman for CVS said the store was closed earlier in the day out of an abundance of caution so no customers or employees were there at the time.
One of our officers has been injured at Mondawmin Mall. The group continues to throw bricks and other items at police officers.— Baltimore Police (@BaltimorePolice) April 27, 2015
Additional officers have been injured in the area of Liberty Heights and Reisterstown Rd. The group continues to throw bricks at officers— Baltimore Police (@BaltimorePolice) April 27, 2015
We are continuing to deploy resources into the neighborhoods around Mondawmin Mall to ensure everyone remains safe.— Baltimore Police (@BaltimorePolice) April 27, 2015
Baltimore City Police Capt. Eric Kowalczyk said at a press availability that fifteen officers had been seriously injured. Two remained in the hospital Monday night, while the others had been released.
"Right now it is a group of lawless individuals with no regard" for safety, he said.
Mayor Stephanie Rawlings-Blake activated Baltimore's emergency operations center Monday afternoon to coordinate response in the city.
Rawlings-Blake said Monday night that the city of Baltimore would institute a curfew beginning Tuesday night at 10 p.m. The curfew would go from 10 p.m. to 5 a.m. and would last for one week. "What that means," she said, "is that if you are on the streets, it's a medical emergency or you're going to work."
Baltimore already has youth curfews, which remain in effect Monday night and throughout the week.
Hogan was briefed on the situation, according to press secretary Shareese DeLeaver Churchill. According to a statement from Hogan earlier Monday, the Maryland State Police have been dispatched in response to the clashes, while the National Guard are on alert.
"Today's looting and acts of violence in Baltimore will not be tolerated," Hogan said. "There is a significant difference between protesting and violence and those committing these acts will be prosecuted under the fullest extent of the law."
Maryland Sen. Barbara Mikulski said: "We are extremely disappointed about the violence that has taken place in Baltimore by a few."
"We know the people of Baltimore. We know they have strong passions, we also know they respect each other’s rights, and we would ask everyone to please do that and certainly we respect the right to express your views but do it in a peaceful way and don’t feed into the very few number that have resorted to vandalism and violence," Mikulski added.
In response to the incidents on Monday, Major League Baseball's Baltimore Orioles cancelled their Monday night game at Baltimore's Camden Yards. Restrictions were also put in place at Baltimore's Penn Station, with only passengers showing tickets being allowed to enter.
"Too many people have spent generations building up this city," Rawlings-Blake said at a press conference Monday night, "for it to be destroyed by thugs."
Edie Foster, Public Information Manager for the Baltimore City Public Schools told ABC News that the schools will be closed on Tuesday.
According to a statement posted to the Baltimore City Schools website, the closure was enacted out of "a heightened responsibility to our students, families, and school communities" at a "time of tension and anxiety." The school system will also make crisis counselors and mental health professionals available to all students.
"We are deeply concerned about our students and community," the statement read, "and we hope to treat this situation not only as a teachable moment but also a time for thoughtful reflection on how we can reduce conflict and violence in our society."
Federal agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives are investigating several fires in Baltimore as possible arsons, an ATF spokesman told ABC News. ATF agents are already actively working fire scenes, including the massive structure fire at a community center. ATF arson investigators will work to determine if the fires were deliberately set, the spokesman said.
Before Gray's funeral on Monday, police had announced that there was a credible threat against law enforcement officers. A police press release warned that members of gangs including the Bloods, Crips, and Black Guerilla Family "have entered into a partnership to 'take-out' law enforcement officers."
Volatile protests had been held throughout the weekend, with some violence reported. Baltimore City Police said that between Saturday afternoon and the early morning Sunday, there had been 34 arrests.
Gray was picked up by police on Sunday, April 12. Police have not officially disclosed a reason why he was taken into custody, though they said Gray fled after officers made eye contact with him.
He went into a coma on Thursday, April 16, and died the morning of Sunday, April 19, his family attorney has said.
Controversy over Gray's arrest spread across the country when footage shot by bystanders appeared to show Gray shouting in pain as he was apprehended.
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