Protests to demand answers in the case of Freddie Gray, the 25-year-old black man who died in Baltimore Police custody last week, descended into chaos on Saturday night. After a few hours of peaceful demonstrations, scores of rowdy protesters crowded outside Camden Yards, where the Baltimore Orioles beat the Boston Red Sox in ten innings. Spectators at the game, with a reported attendance of 36,757, were told that they could not leave the baseball stadium until cleared to do so by police, who allowed them to exit shortly after 10pm when the game ended. Outside, protesters threw objects at cars, kicked windshields, smashed windows and threw a flaming trash can at police in riot gear. Multiple demonstrators were seen jumping on police cars. A civilian car's windshield was also shattered as chants of 'shut it down' were heard during unrest that started around 6.30pm. Violence continued into the evening, with reports of looting and smashing of shop windows despite Baltimore Police Commissioner Anthony Batts's  order for protesters to disperse. Scroll down for videos . After a few hours of peaceful demonstrations against the death of Freddie Gray, 25, in police custody, protesters began climbing on police cars and smashing them with traffic cones . Violence continued from around 6.45pm into the evening when Baltimore Police Commissioner Anthony Batts issued an order for protesters to disperse . Amid growing anti-police sentiments, some protesters turned on police cars while others threw cans and plastic bottles in the direction of police officer . Demonstrators-turned-vandals kick and smash the front windshield of a car outside of Camden Yards in Baltimore as peaceful protests turned violent . At least two cars were damaged in the incidents, as crowds switched from chanting slogans to destroying property . Protesters began violence early in the evening by throwing barricades at police. The police Twitter account repeatedly stated that it was trying to protect the right to protest for demonstrators, who had gathered around 2,000 people in a peaceful rally earlier in the day. From inside the stadium, fans watched as smaller groups of Freddie Gray protesters split off from the main demonstration, throwing cans, bottles and trash cans at police, storefronts and restaurants. A wireless store and a 7-Eleven convenience store were looted, according to a CBS Baltimore reporter. At least two people have been injured and twelve protesters were arrested, according to police. Three-hundred officers were deployed outside Camden Yards, according to Batts. The Commissioner had threatened mass arrests downtown if demonstrators did not leave. Protesters began to disperse as the evening progressed towards 10pm, with a line of police in riot gear marching them backwards. A request from police led to thousands of Baltimore Orioles fans being trapped inside the ballpark at Camden Yards as they awaited police clearance to leave . Spectators at the game were allowed to leave after a walk off homerun by the Orioles in the tenth inning. Above, the scoreboard tells fans that they cannot leave . A 7-Eleven in Baltimore was looted as protesters spread from downtown Baltimore near Camden Yards into the surrounding area . A wireless phone store in the city was also the victim of looters who took advantage of the temporary chaos . Local news coverage captured footage of an unidentified man throwing a flaming trash can at a line of police despite the efforts of bystanders to stop him . A protester threw a rock (next to side mirror) at a police car in downtown Baltimore on Saturday evening . A woman in downtown Baltimore stands near her car, which had its back windshield broken in the chaos . Local news captured live footage of a man throwing a flaming trash can at the police line. A group of roughly 100 protesters broke out a window of a department store with a chair they got at a restaurant across the street at The Gallery, a downtown shopping mall. The same group broke the windows of restaurants including a Subway sandwich shop near Camden Yards, tossing chairs and tables through the glass. Protesters also engaged with a group of Orioles fans at Slider's Bar and Grille and began fighting with patrons. A woman inside one of the restaurants jumped in front of the protesters and begged them to stop throwing things. At least two bystanders - a man and woman - were bleeding from the head. Other people were struck by flying objects. The protesters blocked traffic on major roadways including Interstate 83, where service was later restored following the end of the baseball game. At least two people were injured on Saturday night as protests that began peacefully earlier in the day took a turn for the worst in the evening . A woman in front of a restaurant with a shattered window pleaded with vandals to stop destroying property as small groups of violent demonstrators splintered off from the main contingent . Protesters described as a 'small group of agitators' used chairs to smash shop windows in downtown Baltimore . Protesters and patrons of Slider's Bar and Grille on Baltimore's Washington Blvd began to fight in the escalating violence . Patrons had been drinking beer in the outdoor area of the bar near Camden Yards before the scuffles began . The demonstration arrived at a baseball game between the Boston Red Sox and Baltimore Orioles before violence began around 6.30pm . The University of Maryland, Baltimore, which is north of the stadium, issued a shelter in place warning for students as demonstrations turned violent because of 'civil disturbances' in the area. It advised students and faculty not to come to campus. Baltimore Mayor Stephanie Rawlings-Blake posted on her Twitter account: 'Thx 2 those who have worked to press for peace during these protests. Concerned about the violence and those who want to destroy our city.' During a press conference she said that a 'small group of agitators' turned the demonstrations violent, according to NBC Baltimore. Fredericka Gray, the twin sister of Freddie Gray who spoke to the public for the first time, urged demonstrators not to be violent and said 'Freddie would not want this'. 'Can ya’ll please, please stop the violence?' she said. The funeral for Freddie Gray, who died April 19 after suffering a fatal spinal injury while in police custody, was announced for Monday. Fredericka Gray, the twin sister of Freddie Gray, said her brother 'would not want this' and urged demonstrators to remain peaceful . Protesters and police confront each other outside of Camden Yards, where the demonstrations turned violent . Though some protesters shook hands with police (left), others marched up to the line and stared at officers (right) A demonstrator approaches police armed with riot gear and begins yelling during Saturday's protests . Before the protest turned tense, demonstrators held signs with slogans such as 'Jail Killer Police!' and 'Unite Here!' They filled two city blocks and marched 2 miles to City Hall, where the crowd overtook the grassy plaza adjacent from the building. Tanya Peacher, a 36-year-old Baltimore resident, said she'd never attended a protest in the city before, but watching a video of Gray's arrest motivated her. 'I looked at my son,' she said, 'and thought ''that is my son.'' Late on Friday, Deputy Commissioner Kevin Davis said Gray should have received medical attention at the spot where he was arrested - before he was put inside a police transport van handcuffed and without a seat belt, a violation of the department's policy.. Freddie Gray was detained on April 12 after he ran away from police. He asked for an inhaler as he screamed in pain during the arrest and requested medical attention, but was denied . Gray, who was arrested for carrying a switchblade knife, died a week after the incident from a severed spine . Before the protest turned tense, people held signs with slogans such as 'Jail Killer Police!' and 'Unite Here!' Authorities have not explained how or when Gray's spine was injured. Video showed him being dragged into a police van and police have said he rode in it for about 30 minutes before paramedics were called. Six officers involved in the case have been suspended with pay pending the results of an investigation that includes an independent review. On Saturday, residents young and old, from Baltimore and beyond, gathered around noon and voiced their anger at how the department and the city's officials are handling the investigation into Gray's death. At one point, the crowd paused for a moment of silence in front of Shock Trauma, the hospital where Gray died. The marchers then migrated to Camden Yards. At a downtown intersection, a dozen marchers laid down in the street during an impromptu 'die-in.' The police department has conceded Gray should have received medical attention when he asked for it . People lay in the streets on Saturday afternoon mimicking the way Gray was held as he cried for help during his arrest . Wearing a sign around his neck that said 'I am Freddie Gray,' 33-year-old Dante Acree joined thousands of others outside City Hall. Acree said he came out to the protest because 'it could have been one of my kids.' 'It could have been my brother, my father,' he said. 'I'd want the same support.' Leonard Patterson, 56, said he drove from Manassas, Virginia, to be a part of the protest. Patterson said he decided to come after thinking about his college-aged daughter. 'I'm trying to do everything in my limbs, everything in my power, to make this a better world for her,' said Patterson, holding up his black and white drawing of Freddie Gray. The drawing shows Gray being hoisted from a police van to heaven by two angels. 'I'm here to do what I can. Police brutality is as old as the 1950s, the 1960s. It's still here,' he said. Malik Shabazz, of the Black Lawyers for Justice, leads protesters outside the Western District Police Station . The thousands of protesters at Saturday's rally were the biggest outpouring of public anger since Gray was arrested on April 12 . Commissioner Anthony Batts, who has refused to step down from his post amid uproar following the death, issued an order for protesters to disperse .
Freddie Gray, 25, died after being arrested while screaming in pain and refused medical help for severed spine injury .
Baltimore protesters called for police to be charged and jailed over death .
Peaceful protests escalated into violence, police car windshields smashed .
Reports of looting as protester threw flaming trash can at police in riot gear .
Fans at game between Orioles and Boston Red Sox held until after 10pm .