The Maine branch of the NAACP and other groups plan a “March to End Violence” Sunday afternoon in Portland.

The march is part of a group of nationwide protests after grand juries in Missouri and New York City decided not to file charges against white police officers who killed black men.

Several groups, led by an organization called Portland’s Racial Justice Congress, held a protest march by about 250 people Friday night in downtown Portland, staging a “die-in” at one intersection and snarling traffic. But the protest was peaceful and police made no arrests.

Portland police said they plan to escort the marchers on Sunday. The march will begin around 2 p.m. in Congress Square and head down Congress Street to Chestnut Street and the Portland High School gymnasium, where there will be speeches and songs.

Police said they will divert traffic around the march to try to ensure safety.

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