Anti-police brutality protest have intensified in the United States. Over the weekend, protesters held more die-ins in several cities to express their rage over the grand jury's decision to not file any charges to a police officer in Eric Garner's chokehold death. Most protests turned out peaceful but some have turned violent.

In New York City, several anti-police brutality protest demonstrators gathered again at the site of multiple die-ins over the past few days, Grand Central station and Macy's in Herald Square. According to CNN, the protesters also barged through nearby Toys R Us to lie on the floor collectively. While in California, protesters smashed windows and threw objects at the police.

Late Sunday night, anti-police brutality protesters flooded a highway in Oakland, California sparking a high-strung standoff between demonstrators and the California Highway Patrol in the freeway. According to the authorities, the violent activists threw explosives, bottles and rocks. As reported by Highway Patrol Sgt. Diana McDermott, some of the protesters had Molotov cocktails and M-80 firecrackers.

The grand jury's decisions not to indict the police officers in the cases of Michael Brown in Ferguson and Eric Garner in New York have sparked the nationwide protests.

At the University of California, Berkeley, protesters reportedly threw glass and rocks at the police. CBS News reported a Berkeley police officer was rushed to the hospital for a dislocated shoulder after being hit with a sandbag while another officer sustained minor injuries.

The acts of violence were outward glitches in the depths of anti-police brutality protests nationwide denouncing a grand jury's decisions. Meanwhile, though some marches have turned violent, CNN said some got more creative in voicing their police brutality protests especially against unarmed black men.

In New York, Penn station marchers sang "Justice Carols." While some groups chanted "Black Lives Matter," though most of them were not black.

Meanwhile in Imperial, Missouri, a different kind of protest was held. As reported by CNN affiliate KSDK, protesters burned St. Louis Rams football jerseys because they're disappointed when five players ran onto the field making the "hands-up-don't-shoot gesture" last Sunday. A gesture that has become part in the Michael Brown shooting.

The rallying cry of denouncing police brutality against unarmed black men have now become a national crisis. But as the anti-police brutality protests intensified, it just simply showed that through the diversity of protesters, the problem is more than just a racial discrimination issue.