WASHINGTON (MarketWatch)—Protests were planned Sunday in several more cities in the wake of the acquittal Saturday of George Zimmerman on all charges in the Feb. 26, 2012 shooting death of Trayvon Martin in a case that triggered national debates on racial profiling and self-defense.

Protests loomed in Boston, New York, Chicago and San Francisco, according to The Wall Street Journal as President Obama called for calm in the wake of the emotional, controversial trial.

Obama said the jury had spoken and that Martin’s death was a ”tragedy.” He urged Americans to respect the Martin family’s request for calm reflection. Obama didn’t respond to calls earlier in the day for a federal civil-rights investigation of Martin’s killing.

The new demonstrations would follow reported protests and marches Saturday night in San Francisco; Philadelphia; Chicago; Washington, D.C.; Atlanta; Oakland, Calif., and Sanford, Fla., where the shooting occurred and where a jury acquitted Martin on murder and manslaughter charges.

Protesters march in Chicago

According to the Journal, some protesters in Oakland broke windows, burned flags and started small street fires. At least one police car was damaged.

In Tallahassee, Fla., about 200 demonstrators marched carrying signs that said, ”Racism is Not Dead.”

According to the ABC News report, police were out in force in Sanford, where a crowd of several hundred gathered outside the courthouse was loud at times but peaceful. Read about how Florida awoke to a peaceful Sunday morning.

Zimmerman, 29, then a neighborhood-watch volunteer, fatally shot the 17-year-old Martin, who was unarmed. Zimmerman claimed he shot in self-defense after a fight in a gated community where Martin was visiting his father and his father’s fiancée.

According to the ABC News report, the trial raised strong passions among those who believed Zimmerman, whose mother is a Latina, had racially profiled Martin, who was black.