New York Knicks forward Carmelo Anthony, center, marches to Baltimore...

New York Knicks forward Carmelo Anthony, center, marches to Baltimore City Hall to protest the death of Freddie Gray, Thursday, April 30, 2015, in Baltimore. Credit: AP / Patrick Semansky

Among the hundreds marching in Baltimore in support of Freddie Gray was the Knicks' Carmelo Anthony, a Baltimore native.

"We're being heard. We've just got to be careful to do it the right way. We can't become violent ... we've got to be patient," Anthony said.

Ravens coach John Harbaugh, his players and former star linebacker Ray Lewis visited two Baltimore schools Thursday to help urge calm.

Violence escalated Monday after the funeral of Freddie Gray, who died of injuries while in police custody.

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