ABC News December 17, 2019

Possible mass grave from 1921 Tulsa Race Massacre found by researchers

WATCH: Possible mass grave discovered in Tulsa

Researchers at the University of Oklahoma believe they’ve uncovered a mass grave site from one of the worst race-related massacres in U.S. history -- the 1921 Tulsa Race Massacre.

Scott Hammerstedt, a senior researcher for the Oklahoma Archeological Survey, said at a public hearing Monday that a geophysical scanning in October identified a 25-by-30 foot area at Tulsa’s Oaklawn cemetery that appears to be a pit of some kind that may contain the remains of those killed in the 1921 Tulsa Race Massacre.

Oklahoma Historical Society/Getty Images
Photograph of an African-American man with a camera looking at the skeletons of iron beds which rise above the ashes of a burned-out block after the Tulsa Race Massacre, Tulsa, Okla., 1921.

Scans were completed at Oaklawn Cemetery, Newblock Park and an area known as the Canes, which is near the Arkansas River, according to ABC News affiliate KTUL.

"I'm as confident as I can be in the results that this is a very big candidate with something associated with the massacre," Hammerstedt said at the hearing.

Oklahoma Historical Society/Getty Images
Photograph of a group of National Guard Troops who are carrying rifles with bayonets attached while escorting unarmed African American men after the Tulsa Race Massacre, Tulsa, Okla., 1921.

Following World War I, Tulsa was known for its affluent African American residents and black-owned businesses in an area called the Greenwood District. The district -- which was also referred to as "Black Wall Street" -- was decimated in a two-day riot sparked by a murky elevator encounter between Dick Roland, an African American shoe shiner and Sarah Page, a white elevator operator. Yet tensions had been simmering in the area fueled by "sensational reporting by The Tulsa Tribune, resentment over black economic success, and a racially hostile climate," according to a post on the Tulsa Race Centennial Commission's website. Hundreds were left dead or injured, and homes and businesses were destroyed.

The Oklahoma Historical Society calls the massacre "the single worst incident of racial violence in American history."

In October, Tulsa Mayor G.T. Bynum declared that the city would reexamine the sites.

Oklahoma Historical Society/Getty Images
Photograph of damage from the Tulsa Race Massacre, Tulsa, Okla., June 1921.

Despite the researchers’ findings, no direct link exists between the unmarked graves and the Tulsa massacre.

"Still much work to be done to determine if this is a mass grave from the 1921 Tulsa Race Massacre." Bynum tweeted Monday in response to the most recent findings.

Getty Images, FILE
Black smoke billows from fires during the race riot of 1921, in Tulsa, Okla.

The Public Oversight Committee will reconvene in February to further develop next steps of the physical investigation.