1921 Tulsa Race Riots

Historians say up to 300 Black people were killed in the 1921 attack and the days that followed. Nearly all are believed to have been buried in mass graves approved by white authorities of the time.

Paul Rucker's multimedia work tackles mass incarceration, lynching, police brutality and the ways America has been shaped by slavery. His latest marks the 100th anniversary of the Tulsa Race Massacre.

Tulsa officials said at least 12 coffins were discovered over four days of digging in the city-owned Oaklawn Cemetery. More tests need to be conducted to determine if remains are massacre victims.

As many as 300 Black residents were killed during the Tulsa race massacre. Researchers conducted another excavation in July but found no evidence of human remains at the first site.

As many as 300 African American residents were slaughtered when white mobs descended on Tulsa's Greenwood district nearly a century ago. The lead plaintiff is a 105-year-old survivor of the massacre.

Tulsa officials began a test excavation to determine if land on in city-owned Oaklawn Cemetery is the site of a mass grave of victims of the race massacre. Most of the victims have never been found.

"I'm as confident as I can be in the results that this is a very big candidate for something associated with the massacre," a senior researcher at the Oklahoma Archeological Survey said on Monday.