(Reuters) - The sister of an African-American man who died shortly after a white Minneapolis police officer pinned him down with a knee to the neck called for justice on Wednesday, saying the firing of four policemen over the deadly incident was not enough.

The case is reminiscent of the 2014 killing of Eric Garner, an unarmed black man in New York City, who died after being put in a police chokehold and telling the officers, “I can’t breathe.” The officer who placed Garner in a fatal chokehold was fired but escaped criminal prosecution.

The gathering took an unruly turn around dusk as police in riot gear fired tear gas and non-lethal bean-bag rounds into the crowds, while protesters hurled water bottles and other projectiles, the Minneapolis Star-Tribune reported.

The Police Officers Federation of Minneapolis, the union that represents the city’s police force, said in a statement to local media the officers were cooperating with the investigation and it was “not time to rush to judgment.”.

The six-minute video showed the officers leading the handcuffed man to a wall along the sidewalk and sitting him down as another officer pulled up in a police vehicle.

One of the officers then helped the grimacing man to his feet and, along with another officer, walked him to a police vehicle, where he fell to the ground, the footage showed.